231011331312131 has 4 divisors (see below), whose sum is σ = 231013511119872. Its totient is φ = 231009151504392.

The previous prime is 231011331312121. The next prime is 231011331312161. The reversal of 231011331312131 is 131213133110132.

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 231011331312131 - 2⁶ = 231011331312067 is a prime.

It is a super-2 number, since 2×231011331312131² (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 231011331312131.

It is not an unprimeable number, because it can be changed into a prime (231011331312121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1089744896 + ... + 1089956861.

It is an arithmetic number, because the mean of its divisors is an integer number (57753377779968).

Almost surely, 2^{231011331312131} is an apocalyptic number.

231011331312131 is a deficient number, since it is larger than the sum of its proper divisors (2179807741).

231011331312131 is a wasteful number, since it uses less digits than its factorization.

231011331312131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2179807740.

The product of its (nonzero) digits is 972, while the sum is 26.

Adding to 231011331312131 its reverse (131213133110132), we get a palindrome (362224464422263).

The spelling of 231011331312131 in words is "two hundred thirty-one trillion, eleven billion, three hundred thirty-one million, three hundred twelve thousand, one hundred thirty-one".