231011331312331 has 4 divisors (see below), whose sum is σ = 235926466021152. Its totient is φ = 226096196603512.

The previous prime is 231011331312301. The next prime is 231011331312341. The reversal of 231011331312331 is 133213133110132.

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 231011331312331 - 2³⁹ = 230461575498443 is a prime.

It is a super-2 number, since 2×231011331312331² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231011331312331.

It is not an unprimeable number, because it can be changed into a prime (231011331312301) 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, 2457567354340 + ... + 2457567354433.

It is an arithmetic number, because the mean of its divisors is an integer number (58981616505288).

Almost surely, 2^{231011331312331} is an apocalyptic number.

231011331312331 is a deficient number, since it is larger than the sum of its proper divisors (4915134708821).

231011331312331 is an equidigital number, since it uses as much as digits as its factorization.

231011331312331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4915134708820.

The product of its (nonzero) digits is 2916, while the sum is 28.

Adding to 231011331312331 its reverse (133213133110132), we get a palindrome (364224464422463).

The spelling of 231011331312331 in words is "two hundred thirty-one trillion, eleven billion, three hundred thirty-one million, three hundred twelve thousand, three hundred thirty-one".