11231512131 has 8 divisors (see below), whose sum is σ = 17114685184. Its totient is φ = 6418006920.

The previous prime is 11231512069. The next prime is 11231512139. The reversal of 11231512131 is 13121513211.

11231512131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11231512131 - 2⁷ = 11231512003 is a prime.

It is a super-3 number, since 3×11231512131³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 534833911 = 11231512131 / (1 + 1 + 2 + 3 + 1 + 5 + 1 + 2 + 1 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11231512098 and 11231512107.

It is not an unprimeable number, because it can be changed into a prime (11231512139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267416935 + ... + 267416976.

It is an arithmetic number, because the mean of its divisors is an integer number (2139335648).

Almost surely, 2^11231512131 is an apocalyptic number.

11231512131 is a deficient number, since it is larger than the sum of its proper divisors (5883173053).

11231512131 is an equidigital number, since it uses as much as digits as its factorization.

11231512131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534833921.

The product of its digits is 180, while the sum is 21.

The spelling of 11231512131 in words is "eleven billion, two hundred thirty-one million, five hundred twelve thousand, one hundred thirty-one".