21012210012013 has 32 divisors (see below), whose sum is σ = 23534001279360. Its totient is φ = 18595366594560.

The previous prime is 21012210011899. The next prime is 21012210012019. The reversal of 21012210012013 is 31021001221012.

It is not a de Polignac number, because 21012210012013 - 2¹⁷ = 21012209880941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012210012019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 445821033 + ... + 445868161.

It is an arithmetic number, because the mean of its divisors is an integer number (735437539980).

Almost surely, 2^{21012210012013} is an apocalyptic number.

It is an amenable number.

21012210012013 is a deficient number, since it is larger than the sum of its proper divisors (2521791267347).

21012210012013 is a wasteful number, since it uses less digits than its factorization.

21012210012013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50317.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21012210012013 its reverse (31021001221012), we get a palindrome (52033211233025).

The spelling of 21012210012013 in words is "twenty-one trillion, twelve billion, two hundred ten million, twelve thousand, thirteen".