21193239112 has 32 divisors (see below), whose sum is σ = 40575850200. Its totient is φ = 10375133184.

The previous prime is 21193239073. The next prime is 21193239113.

21193239112 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 16888042116 + 4305196996 = 129954^2 + 65614^2 .

It is not an unprimeable number, because it can be changed into a prime (21193239113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52437 + ... + 212452.

Almost surely, 2^21193239112 is an apocalyptic number.

It is an amenable number.

21193239112 is a deficient number, since it is larger than the sum of its proper divisors (19382611088).

21193239112 is a wasteful number, since it uses less digits than its factorization.

21193239112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265105 (or 265101 counting only the distinct ones).

The product of its digits is 5832, while the sum is 34.

The spelling of 21193239112 in words is "twenty-one billion, one hundred ninety-three million, two hundred thirty-nine thousand, one hundred twelve".