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2011102221 = 323191152599
BaseRepresentation
bin111011111011110…
…1111110000001101
312012011020120121110
41313313233300031
513104320232341
6531320522233
7100560041532
oct16767576015
95164216543
102011102221
1194223a957
12481620379
1326086381b
14151148d89
15bb857216
hex77defc0d

2011102221 has 16 divisors (see below), whose sum is σ = 2812723200. Its totient is φ = 1275719280.

The previous prime is 2011102213. The next prime is 2011102231. The reversal of 2011102221 is 1222011102.

It is not a de Polignac number, because 2011102221 - 23 = 2011102213 is a prime.

It is a super-2 number, since 2×20111022212 = 8089064286622265682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2011102197 and 2011102206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011102231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63121 + ... + 89478.

It is an arithmetic number, because the mean of its divisors is an integer number (175795200).

Almost surely, 22011102221 is an apocalyptic number.

It is an amenable number.

2011102221 is a deficient number, since it is larger than the sum of its proper divisors (801620979).

2011102221 is a wasteful number, since it uses less digits than its factorization.

2011102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152816.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2011102221 is about 44845.3143706229. The cubic root of 2011102221 is about 1262.2480696669.

Adding to 2011102221 its reverse (1222011102), we get a palindrome (3233113323).

The spelling of 2011102221 in words is "two billion, eleven million, one hundred two thousand, two hundred twenty-one".

Divisors: 1 3 23 69 191 573 4393 13179 152599 457797 3509777 10529331 29146409 87439227 670367407 2011102221