21012002013 has 8 divisors (see below), whose sum is σ = 28022400576. Its totient is φ = 14004802400.

The previous prime is 21012002009. The next prime is 21012002021. The reversal of 21012002013 is 31020021012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21012002013 - 2² = 21012002009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21012002013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012003013) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 784368 + ... + 810713.

It is an arithmetic number, because the mean of its divisors is an integer number (3502800072).

Almost surely, 2^21012002013 is an apocalyptic number.

It is an amenable number.

21012002013 is a deficient number, since it is larger than the sum of its proper divisors (7010398563).

21012002013 is a wasteful number, since it uses less digits than its factorization.

21012002013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1599475.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21012002013 its reverse (31020021012), we get a palindrome (52032023025).

The spelling of 21012002013 in words is "twenty-one billion, twelve million, two thousand, thirteen".