13011220131 has 64 divisors (see below), whose sum is σ = 21688504320. Its totient is φ = 6755374080.

The previous prime is 13011220093. The next prime is 13011220141. The reversal of 13011220131 is 13102211031.

It is a happy number.

It is not a de Polignac number, because 13011220131 - 2⁶ = 13011220067 is a prime.

It is a super-2 number, since 2×13011220131² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13011220131.

It is not an unprimeable number, because it can be changed into a prime (13011220141) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9078991 + ... + 9080423.

It is an arithmetic number, because the mean of its divisors is an integer number (338882880).

Almost surely, 2^13011220131 is an apocalyptic number.

13011220131 is a deficient number, since it is larger than the sum of its proper divisors (8677284189).

13011220131 is a wasteful number, since it uses less digits than its factorization.

13011220131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1956.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 13011220131 its reverse (13102211031), we get a palindrome (26113431162).

The spelling of 13011220131 in words is "thirteen billion, eleven million, two hundred twenty thousand, one hundred thirty-one".