22111121011212 has 144 divisors (see below), whose sum is σ = 58572508700160. Its totient is φ = 7019674066944.

The previous prime is 22111121011201. The next prime is 22111121011249. The reversal of 22111121011212 is 21211012111122.

It is a happy number.

22111121011212 is a `hidden beast` number, since 221 + 1 + 11 + 210 + 11 + 212 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 566656239 + ... + 566695257.

It is an arithmetic number, because the mean of its divisors is an integer number (406753532640).

Almost surely, 2^{22111121011212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22111121011212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29286254350080).

22111121011212 is an abundant number, since it is smaller than the sum of its proper divisors (36461387688948).

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

22111121011212 is a wasteful number, since it uses less digits than its factorization.

22111121011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41972 (or 41967 counting only the distinct ones).

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

Adding to 22111121011212 its reverse (21211012111122), we get a palindrome (43322133122334).

The spelling of 22111121011212 in words is "twenty-two trillion, one hundred eleven billion, one hundred twenty-one million, eleven thousand, two hundred twelve".