21200120092 has 12 divisors (see below), whose sum is σ = 37608432736. Its totient is φ = 10454853600.

The previous prime is 21200120087. The next prime is 21200120159. The reversal of 21200120092 is 29002100212.

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, 36301284 + ... + 36301867.

Almost surely, 2^21200120092 is an apocalyptic number.

It is an amenable number.

21200120092 is a deficient number, since it is larger than the sum of its proper divisors (16408312644).

21200120092 is a wasteful number, since it uses less digits than its factorization.

21200120092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72603228 (or 72603226 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The spelling of 21200120092 in words is "twenty-one billion, two hundred million, one hundred twenty thousand, ninety-two".