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2011111021220 = 225766121732343
BaseRepresentation
bin11101010000111111100…
…011101101101010100100
321010021000210012012200112
4131100333203231222210
5230422223410134340
64135520332432152
7265204130424650
oct35207743555244
97107023165615
102011111021220
117059a8818554
12285925018658
13117854490b42
146d4a43bda60
15374a869c065
hex1d43f8edaa4

2011111021220 has 48 divisors (see below), whose sum is σ = 4833968740608. Its totient is φ = 688480594560.

The previous prime is 2011111021193. The next prime is 2011111021289. The reversal of 2011111021220 is 221201111102.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 2011111021195 and 2011111021204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10773632 + ... + 10958711.

It is an arithmetic number, because the mean of its divisors is an integer number (100707682096).

Almost surely, 22011111021220 is an apocalyptic number.

2011111021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011111021220 is an abundant number, since it is smaller than the sum of its proper divisors (2822857719388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2011111021220 is a wasteful number, since it uses less digits than its factorization.

2011111021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21733020 (or 21733018 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2011111021220 its reverse (221201111102), we get a palindrome (2232312132322).

The spelling of 2011111021220 in words is "two trillion, eleven billion, one hundred eleven million, twenty-one thousand, two hundred twenty".

Divisors: 1 2 4 5 7 10 14 20 28 35 70 140 661 1322 2644 3305 4627 6610 9254 13220 18508 23135 46270 92540 21732343 43464686 86929372 108661715 152126401 217323430 304252802 434646860 608505604 760632005 1521264010 3042528020 14365078723 28730157446 57460314892 71825393615 100555551061 143650787230 201111102122 287301574460 402222204244 502777755305 1005555510610 2011111021220