11331020131 has 4 divisors (see below), whose sum is σ = 11366764992. Its totient is φ = 11295275272.

The previous prime is 11331020123. The next prime is 11331020159. The reversal of 11331020131 is 13102013311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11331020131 - 2³ = 11331020123 is a prime.

It is a super-2 number, since 2×11331020131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11331020111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17871955 + ... + 17872588.

It is an arithmetic number, because the mean of its divisors is an integer number (2841691248).

Almost surely, 2^11331020131 is an apocalyptic number.

11331020131 is a deficient number, since it is larger than the sum of its proper divisors (35744861).

11331020131 is an equidigital number, since it uses as much as digits as its factorization.

11331020131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35744860.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 11331020131 its reverse (13102013311), we get a palindrome (24433033442).

The spelling of 11331020131 in words is "eleven billion, three hundred thirty-one million, twenty thousand, one hundred thirty-one".