21023031133313 has 24 divisors (see below), whose sum is σ = 23874623447808. Its totient is φ = 18478862028000.

The previous prime is 21023031133301. The next prime is 21023031133343. The reversal of 21023031133313 is 31333113032012.

It is not a de Polignac number, because 21023031133313 - 2¹⁶ = 21023031067777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21023031133343) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1716983 + ... + 6707763.

It is an arithmetic number, because the mean of its divisors is an integer number (994775976992).

Almost surely, 2^{21023031133313} is an apocalyptic number.

It is an amenable number.

21023031133313 is a deficient number, since it is larger than the sum of its proper divisors (2851592314495).

21023031133313 is a wasteful number, since it uses less digits than its factorization.

21023031133313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4991957 (or 4991946 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 21023031133313 its reverse (31333113032012), we get a palindrome (52356144165325).

The spelling of 21023031133313 in words is "twenty-one trillion, twenty-three billion, thirty-one million, one hundred thirty-three thousand, three hundred thirteen".