22220221021212 has 12 divisors (see below), whose sum is σ = 51847182382856. Its totient is φ = 7406740340400.

The previous prime is 22220221021181. The next prime is 22220221021321. The reversal of 22220221021212 is 21212012202222.

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

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, 925842542539 + ... + 925842542562.

Almost surely, 2^{22220221021212} is an apocalyptic number.

It is an amenable number.

22220221021212 is an abundant number, since it is smaller than the sum of its proper divisors (29626961361644).

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

22220221021212 is a wasteful number, since it uses less digits than its factorization.

22220221021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851685085108 (or 1851685085106 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 22220221021212 its reverse (21212012202222), we get a palindrome (43432233223434).

The spelling of 22220221021212 in words is "twenty-two trillion, two hundred twenty billion, two hundred twenty-one million, twenty-one thousand, two hundred twelve".