11231201131 has 4 divisors (see below), whose sum is σ = 11822317000. Its totient is φ = 10640085264.

The previous prime is 11231201099. The next prime is 11231201143. The reversal of 11231201131 is 13110213211.

It is a happy number.

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 11231201131 - 2⁵ = 11231201099 is a prime.

It is a super-2 number, since 2×11231201131² (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 (11231202131) 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, 295557906 + ... + 295557943.

It is an arithmetic number, because the mean of its divisors is an integer number (2955579250).

Almost surely, 2^11231201131 is an apocalyptic number.

11231201131 is a deficient number, since it is larger than the sum of its proper divisors (591115869).

11231201131 is an equidigital number, since it uses as much as digits as its factorization.

11231201131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591115868.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 11231201131 its reverse (13110213211), we get a palindrome (24341414342).

The spelling of 11231201131 in words is "eleven billion, two hundred thirty-one million, two hundred one thousand, one hundred thirty-one".