21014051013 has 6 divisors (see below), whose sum is σ = 30353629254. Its totient is φ = 14009367336.

The previous prime is 21014050987. The next prime is 21014051017. The reversal of 21014051013 is 31015041012.

21014051013 is a `hidden beast` number, since 2 + 1 + 0 + 140 + 510 + 13 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14639306049 + 6374744964 = 120993^2 + 79842^2 .

It is not a de Polignac number, because 21014051013 - 2²⁴ = 20997273797 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014051017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1167447270 + ... + 1167447287.

It is an arithmetic number, because the mean of its divisors is an integer number (5058938209).

Almost surely, 2^21014051013 is an apocalyptic number.

It is an amenable number.

21014051013 is a deficient number, since it is larger than the sum of its proper divisors (9339578241).

21014051013 is a wasteful number, since it uses less digits than its factorization.

21014051013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2334894563 (or 2334894560 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 21014051013 its reverse (31015041012), we get a palindrome (52029092025).

The spelling of 21014051013 in words is "twenty-one billion, fourteen million, fifty-one thousand, thirteen".