20121122211992 has 16 divisors (see below), whose sum is σ = 37759322016600. Its totient is φ = 10051969674240.

The previous prime is 20121122211877. The next prime is 20121122212021. The reversal of 20121122211992 is 29911222112102.

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, 1073919017 + ... + 1073937752.

Almost surely, 2^{20121122211992} is an apocalyptic number.

It is an amenable number.

20121122211992 is a deficient number, since it is larger than the sum of its proper divisors (17638199804608).

20121122211992 is a wasteful number, since it uses less digits than its factorization.

20121122211992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147857946 (or 2147857942 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 35.

The spelling of 20121122211992 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred eleven thousand, nine hundred ninety-two".