21160724012 has 12 divisors (see below), whose sum is σ = 37035121536. Its totient is φ = 10579260720.

The previous prime is 21160724009. The next prime is 21160724029. The reversal of 21160724012 is 21042706112.

It is a super-2 number, since 2×21160724012² (a number of 21 digits) contains 22 as substring.

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, 231308 + ... + 309555.

It is an arithmetic number, because the mean of its divisors is an integer number (3086260128).

Almost surely, 2^21160724012 is an apocalyptic number.

It is an amenable number.

21160724012 is a deficient number, since it is larger than the sum of its proper divisors (15874397524).

21160724012 is a wasteful number, since it uses less digits than its factorization.

21160724012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550648 (or 550646 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The spelling of 21160724012 in words is "twenty-one billion, one hundred sixty million, seven hundred twenty-four thousand, twelve".