11331013131 has 20 divisors (see below), whose sum is σ = 16934234592. Its totient is φ = 7550590608.

The previous prime is 11331013123. The next prime is 11331013151. The reversal of 11331013131 is 13131013311.

It is not a de Polignac number, because 11331013131 - 2³ = 11331013123 is a prime.

It is a super-2 number, since 2×11331013131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11331013151) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 155230 + ... + 216236.

Almost surely, 2^11331013131 is an apocalyptic number.

11331013131 is a deficient number, since it is larger than the sum of its proper divisors (5603221461).

11331013131 is an equidigital number, since it uses as much as digits as its factorization.

11331013131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63312 (or 63303 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 18.

Adding to 11331013131 its reverse (13131013311), we get a palindrome (24462026442).

The spelling of 11331013131 in words is "eleven billion, three hundred thirty-one million, thirteen thousand, one hundred thirty-one".