22021122121212 has 48 divisors (see below), whose sum is σ = 51680845827072. Its totient is φ = 7297772107200.

The previous prime is 22021122121211. The next prime is 22021122121259. The reversal of 22021122121212 is 21212122112022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021122121211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112319533 + ... + 112515419.

It is an arithmetic number, because the mean of its divisors is an integer number (1076684288064).

Almost surely, 2^{22021122121212} is an apocalyptic number.

It is an amenable number.

22021122121212 is an abundant number, since it is smaller than the sum of its proper divisors (29659723705860).

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

22021122121212 is a wasteful number, since it uses less digits than its factorization.

22021122121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250218 (or 250216 counting only the distinct ones).

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

Adding to 22021122121212 its reverse (21212122112022), we get a palindrome (43233244233234).

The spelling of 22021122121212 in words is "twenty-two trillion, twenty-one billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred twelve".