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2101121020 = 225127827213
BaseRepresentation
bin111110100111100…
…1000111111111100
312102102122000012001
41331033020333330
513300341333040
6544254152044
7103032143155
oct17517107774
95372560161
102101121020
11989034359
124a77b2624
132763c119b
1415d09c92c
15c46d959a
hex7d3c8ffc

2101121020 has 24 divisors (see below), whose sum is σ = 4447102464. Its totient is φ = 833829696.

The previous prime is 2101121017. The next prime is 2101121063. The reversal of 2101121020 is 201211012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 2101120988 and 2101121006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411067 + ... + 416146.

It is an arithmetic number, because the mean of its divisors is an integer number (185295936).

Almost surely, 22101121020 is an apocalyptic number.

2101121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101121020 is an abundant number, since it is smaller than the sum of its proper divisors (2345981444).

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

2101121020 is a wasteful number, since it uses less digits than its factorization.

2101121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827349 (or 827347 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2101121020 is about 45837.9866486302. The cubic root of 2101121020 is about 1280.8069903032.

Adding to 2101121020 its reverse (201211012), we get a palindrome (2302332032).

The spelling of 2101121020 in words is "two billion, one hundred one million, one hundred twenty-one thousand, twenty".

Divisors: 1 2 4 5 10 20 127 254 508 635 1270 2540 827213 1654426 3308852 4136065 8272130 16544260 105056051 210112102 420224204 525280255 1050560510 2101121020