22221202111212 has 48 divisors (see below), whose sum is σ = 55838365261280. Its totient is φ = 6837235066368.

The previous prime is 22221202111193. The next prime is 22221202111223. The reversal of 22221202111212 is 21211120212222.

It is a super-2 number, since 2×22221202111212² (a number of 27 digits) contains 22 as substring.

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, 20165928 + ... + 21239280.

Almost surely, 2^{22221202111212} is an apocalyptic number.

It is an amenable number.

22221202111212 is an abundant number, since it is smaller than the sum of its proper divisors (33617163150068).

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

22221202111212 is a wasteful number, since it uses less digits than its factorization.

22221202111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206082 (or 1206080 counting only the distinct ones).

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

Adding to 22221202111212 its reverse (21211120212222), we get a palindrome (43432322323434).

The spelling of 22221202111212 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred two million, one hundred eleven thousand, two hundred twelve".