22120121212 has 24 divisors (see below), whose sum is σ = 44462566400. Its totient is φ = 9432411120.

The previous prime is 22120121159. The next prime is 22120121237. The reversal of 22120121212 is 21212102122.

It is a happy number.

22120121212 is a modest number, since divided by 121212 gives 22120 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1979364 + ... + 1990507.

Almost surely, 2^22120121212 is an apocalyptic number.

It is an amenable number.

22120121212 is an abundant number, since it is smaller than the sum of its proper divisors (22342445188).

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

22120121212 is a wasteful number, since it uses less digits than its factorization.

22120121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3970081 (or 3970079 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22120121212 its reverse (21212102122), we get a palindrome (43332223334).

The spelling of 22120121212 in words is "twenty-two billion, one hundred twenty million, one hundred twenty-one thousand, two hundred twelve".