22111112212110 has 64 divisors (see below), whose sum is σ = 58964442566400. Its totient is φ = 5896148923296.

The previous prime is 22111112212081. The next prime is 22111112212117. The reversal of 22111112212110 is 1121221111122.

It is a happy number.

22111112212110 is a `hidden beast` number, since 221 + 1 + 1 + 11 + 221 + 211 + 0 = 666.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111112212117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9994437 + ... + 12004623.

It is an arithmetic number, because the mean of its divisors is an integer number (921319415100).

Almost surely, 2^{22111112212110} is an apocalyptic number.

22111112212110 is an abundant number, since it is smaller than the sum of its proper divisors (36853330354290).

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

22111112212110 is a wasteful number, since it uses less digits than its factorization.

22111112212110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050942 (or 2050936 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 22111112212110 its reverse (1121221111122), we get a palindrome (23232333323232).

The spelling of 22111112212110 in words is "twenty-two trillion, one hundred eleven billion, one hundred twelve million, two hundred twelve thousand, one hundred ten".