11142331231 has 4 divisors (see below), whose sum is σ = 11144034000. Its totient is φ = 11140628464.

The previous prime is 11142331169. The next prime is 11142331261. The reversal of 11142331231 is 13213324111.

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 11142331231 - 2⁷ = 11142331103 is a prime.

It is a super-2 number, since 2×11142331231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11142331261) 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, 841531 + ... + 854668.

It is an arithmetic number, because the mean of its divisors is an integer number (2786008500).

Almost surely, 2^11142331231 is an apocalyptic number.

11142331231 is a deficient number, since it is larger than the sum of its proper divisors (1702769).

11142331231 is an equidigital number, since it uses as much as digits as its factorization.

11142331231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702768.

The product of its digits is 432, while the sum is 22.

Adding to 11142331231 its reverse (13213324111), we get a palindrome (24355655342).

The spelling of 11142331231 in words is "eleven billion, one hundred forty-two million, three hundred thirty-one thousand, two hundred thirty-one".