13021131 has 16 divisors (see below), whose sum is σ = 17891456. Its totient is φ = 8418816.

The previous prime is 13021117. The next prime is 13021139. The reversal of 13021131 is 13112031.

It is not a de Polignac number, because 13021131 - 2¹⁵ = 12988363 is a prime.

It is a super-2 number, since 2×13021131² = 339099705038322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13021139) 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, 24636 + ... + 25158.

It is an arithmetic number, because the mean of its divisors is an integer number (1118216).

Almost surely, 2^13021131 is an apocalyptic number.

13021131 is a deficient number, since it is larger than the sum of its proper divisors (4870325).

13021131 is a wasteful number, since it uses less digits than its factorization.

13021131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 13021131 is about 3608.4804281027. The cubic root of 13021131 is about 235.2607999430.

Adding to 13021131 its reverse (13112031), we get a palindrome (26133162).

The spelling of 13021131 in words is "thirteen million, twenty-one thousand, one hundred thirty-one".