21311300231313 has 16 divisors (see below), whose sum is σ = 28480113331200. Its totient is φ = 14175014224896.

The previous prime is 21311300231261. The next prime is 21311300231329. The reversal of 21311300231313 is 31313200311312.

It is not a de Polignac number, because 21311300231313 - 2⁴⁰ = 20211788603537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21311300231363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21673131 + ... + 22635087.

It is an arithmetic number, because the mean of its divisors is an integer number (1780007083200).

Almost surely, 2^{21311300231313} is an apocalyptic number.

It is an amenable number.

21311300231313 is a deficient number, since it is larger than the sum of its proper divisors (7168813099887).

21311300231313 is a wasteful number, since it uses less digits than its factorization.

21311300231313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978856.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 21311300231313 its reverse (31313200311312), we get a palindrome (52624500542625).

The spelling of 21311300231313 in words is "twenty-one trillion, three hundred eleven billion, three hundred million, two hundred thirty-one thousand, three hundred thirteen".