22111222221012 has 48 divisors (see below), whose sum is σ = 54312782126400. Its totient is φ = 6981910467840.

The previous prime is 22111222221007. The next prime is 22111222221037. The reversal of 22111222221012 is 21012222211122.

It is a super-2 number, since 2×22111222221012² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22111222221012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1281687 + ... + 6772382.

It is an arithmetic number, because the mean of its divisors is an integer number (1131516294300).

Almost surely, 2^{22111222221012} is an apocalyptic number.

It is an amenable number.

22111222221012 is an abundant number, since it is smaller than the sum of its proper divisors (32201559905388).

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

22111222221012 is a wasteful number, since it uses less digits than its factorization.

22111222221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8066136 (or 8066134 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 22111222221012 its reverse (21012222211122), we get a palindrome (43123444432134).

The spelling of 22111222221012 in words is "twenty-two trillion, one hundred eleven billion, two hundred twenty-two million, two hundred twenty-one thousand, twelve".