231120214131 has 4 divisors (see below), whose sum is σ = 308160285512. Its totient is φ = 154080142752.

The previous prime is 231120214123. The next prime is 231120214139. The reversal of 231120214131 is 131412021132.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (231120214123) and next prime (231120214139).

It is not a de Polignac number, because 231120214131 - 2³ = 231120214123 is a prime.

It is a super-2 number, since 2×231120214131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231120214098 and 231120214107.

It is not an unprimeable number, because it can be changed into a prime (231120214139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38520035686 + ... + 38520035691.

It is an arithmetic number, because the mean of its divisors is an integer number (77040071378).

Almost surely, 2^231120214131 is an apocalyptic number.

231120214131 is a deficient number, since it is larger than the sum of its proper divisors (77040071381).

231120214131 is an equidigital number, since it uses as much as digits as its factorization.

231120214131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77040071380.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 231120214131 its reverse (131412021132), we get a palindrome (362532235263).

The spelling of 231120214131 in words is "two hundred thirty-one billion, one hundred twenty million, two hundred fourteen thousand, one hundred thirty-one".