22111211211012 has 144 divisors (see below), whose sum is σ = 72746842271040. Its totient is φ = 5743171728000.

The previous prime is 22111211210981. The next prime is 22111211211013. The reversal of 22111211211012 is 21011211211122.

It is a happy number.

22111211211012 is a `hidden beast` number, since 221 + 11 + 211 + 211 + 0 + 12 = 666.

It is a super-2 number, since 2×22111211211012² (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 (22111211211013) 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, 189861489 + ... + 189977912.

It is an arithmetic number, because the mean of its divisors is an integer number (505186404660).

Almost surely, 2^{22111211211012} is an apocalyptic number.

22111211211012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22111211211012 is an abundant number, since it is smaller than the sum of its proper divisors (50635631060028).

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

22111211211012 is a wasteful number, since it uses less digits than its factorization.

22111211211012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379839439 (or 379839424 counting only the distinct ones).

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

Adding to 22111211211012 its reverse (21011211211122), we get a palindrome (43122422422134).

The spelling of 22111211211012 in words is "twenty-two trillion, one hundred eleven billion, two hundred eleven million, two hundred eleven thousand, twelve".