21407231012 has 12 divisors (see below), whose sum is σ = 37463837040. Its totient is φ = 10703277576.

The previous prime is 21407231003. The next prime is 21407231029. The reversal of 21407231012 is 21013270412.

It is a super-2 number, since 2×21407231012² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105539 + ... + 232277.

It is an arithmetic number, because the mean of its divisors is an integer number (3121986420).

Almost surely, 2^21407231012 is an apocalyptic number.

It is an amenable number.

21407231012 is a deficient number, since it is larger than the sum of its proper divisors (16056606028).

21407231012 is a wasteful number, since it uses less digits than its factorization.

21407231012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168970 (or 168968 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The spelling of 21407231012 in words is "twenty-one billion, four hundred seven million, two hundred thirty-one thousand, twelve".