22102111212012 has 144 divisors (see below), whose sum is σ = 64746431124480. Its totient is φ = 6504969062592.

The previous prime is 22102111212001. The next prime is 22102111212017. The reversal of 22102111212012 is 21021211120122.

It is a super-2 number, since 2×22102111212012² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (22102111212017) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25905028 + ... + 26744619.

It is an arithmetic number, because the mean of its divisors is an integer number (449627993920).

Almost surely, 2^{22102111212012} is an apocalyptic number.

It is an amenable number.

22102111212012 is an abundant number, since it is smaller than the sum of its proper divisors (42644319912468).

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

22102111212012 is a wasteful number, since it uses less digits than its factorization.

22102111212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52649709 (or 52649688 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 22102111212012 its reverse (21021211120122), we get a palindrome (43123322332134).

The spelling of 22102111212012 in words is "twenty-two trillion, one hundred two billion, one hundred eleven million, two hundred twelve thousand, twelve".