22021221022012 has 12 divisors (see below), whose sum is σ = 39780270233536. Its totient is φ = 10655429526720.

The previous prime is 22021221021997. The next prime is 22021221022027. The reversal of 22021221022012 is 21022012212022.

It is an interprime number because it is at equal distance from previous prime (22021221021997) and next prime (22021221022027).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88795245933 + ... + 88795246180.

Almost surely, 2^{22021221022012} is an apocalyptic number.

It is an amenable number.

22021221022012 is a deficient number, since it is larger than the sum of its proper divisors (17759049211524).

22021221022012 is a wasteful number, since it uses less digits than its factorization.

22021221022012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177590492148 (or 177590492146 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 22021221022012 its reverse (21022012212022), we get a palindrome (43043233234034).

The spelling of 22021221022012 in words is "twenty-two trillion, twenty-one billion, two hundred twenty-one million, twenty-two thousand, twelve".