22221121012212 has 12 divisors (see below), whose sum is σ = 51849282361856. Its totient is φ = 7407040337400.

The previous prime is 22221121012141. The next prime is 22221121012213. The reversal of 22221121012212 is 21221012112222.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221121012213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 925880042164 + ... + 925880042187.

Almost surely, 2^{22221121012212} is an apocalyptic number.

It is an amenable number.

22221121012212 is an abundant number, since it is smaller than the sum of its proper divisors (29628161349644).

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

22221121012212 is a wasteful number, since it uses less digits than its factorization.

22221121012212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851760084358 (or 1851760084356 counting only the distinct ones).

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

Adding to 22221121012212 its reverse (21221012112222), we get a palindrome (43442133124434).

The spelling of 22221121012212 in words is "twenty-two trillion, two hundred twenty-one billion, one hundred twenty-one million, twelve thousand, two hundred twelve".