21232752012 has 36 divisors (see below), whose sum is σ = 53682861960. Its totient is φ = 7076109312.

The previous prime is 21232751993. The next prime is 21232752043. The reversal of 21232752012 is 21025723212.

21232752012 is a `hidden beast` number, since 2 + 123 + 2 + 7 + 520 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121164 + ... + 239052.

It is an arithmetic number, because the mean of its divisors is an integer number (1491190610).

Almost surely, 2^21232752012 is an apocalyptic number.

It is an amenable number.

21232752012 is an abundant number, since it is smaller than the sum of its proper divisors (32450109948).

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

21232752012 is a wasteful number, since it uses less digits than its factorization.

21232752012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122902 (or 122897 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The spelling of 21232752012 in words is "twenty-one billion, two hundred thirty-two million, seven hundred fifty-two thousand, twelve".