11231204131 has 16 divisors (see below), whose sum is σ = 12963397824. Its totient is φ = 9531131904.

The previous prime is 11231204113. The next prime is 11231204137. The reversal of 11231204131 is 13140213211.

It is not a de Polignac number, because 11231204131 - 2⁹ = 11231203619 is a prime.

It is a super-2 number, since 2×11231204131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11231204099 and 11231204108.

It is not an unprimeable number, because it can be changed into a prime (11231204137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 765541 + ... + 780073.

It is an arithmetic number, because the mean of its divisors is an integer number (810212364).

Almost surely, 2^11231204131 is an apocalyptic number.

11231204131 is a deficient number, since it is larger than the sum of its proper divisors (1732193693).

11231204131 is a wasteful number, since it uses less digits than its factorization.

11231204131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15630.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 11231204131 its reverse (13140213211), we get a palindrome (24371417342).

It can be divided in two parts, 1123120 and 4131, that added together give a triangular number (1127251 = T₁₅₀₁).

The spelling of 11231204131 in words is "eleven billion, two hundred thirty-one million, two hundred four thousand, one hundred thirty-one".