231012131 has 4 divisors (see below), whose sum is σ = 264013872. Its totient is φ = 198010392.

The previous prime is 231012113. The next prime is 231012143. The reversal of 231012131 is 131210132.

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 231012131 - 2¹⁰ = 231011107 is a prime.

It is a super-2 number, since 2×231012131² = 106733209338322322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231012101) 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, 16500860 + ... + 16500873.

It is an arithmetic number, because the mean of its divisors is an integer number (66003468).

Almost surely, 2^231012131 is an apocalyptic number.

231012131 is a deficient number, since it is larger than the sum of its proper divisors (33001741).

231012131 is an equidigital number, since it uses as much as digits as its factorization.

231012131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33001740.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 231012131 is about 15199.0832289319. The cubic root of 231012131 is about 613.5899845138.

Adding to 231012131 its reverse (131210132), we get a palindrome (362222263).

It can be divided in two parts, 2310 and 12131, that added together give a palindrome (14441).

The spelling of 231012131 in words is "two hundred thirty-one million, twelve thousand, one hundred thirty-one".