11003231131 has 4 divisors (see below), whose sum is σ = 11271602664. Its totient is φ = 10734859600.

The previous prime is 11003231123. The next prime is 11003231207. The reversal of 11003231131 is 13113230011.

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 11003231131 - 2³ = 11003231123 is a prime.

It is a super-2 number, since 2×11003231131² (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 (11003231101) 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, 134185705 + ... + 134185786.

It is an arithmetic number, because the mean of its divisors is an integer number (2817900666).

Almost surely, 2^11003231131 is an apocalyptic number.

11003231131 is a deficient number, since it is larger than the sum of its proper divisors (268371533).

11003231131 is an equidigital number, since it uses as much as digits as its factorization.

11003231131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268371532.

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

Adding to 11003231131 its reverse (13113230011), we get a palindrome (24116461142).

The spelling of 11003231131 in words is "eleven billion, three million, two hundred thirty-one thousand, one hundred thirty-one".