1310120231 has 4 divisors (see below), whose sum is σ = 1497280272. Its totient is φ = 1122960192.

The previous prime is 1310120219. The next prime is 1310120239. The reversal of 1310120231 is 1320210131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1310120231 is a prime.

It is a super-2 number, since 2×1310120231² = 3432830039350986722, which 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 (1310120239) 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, 93580010 + ... + 93580023.

It is an arithmetic number, because the mean of its divisors is an integer number (374320068).

Almost surely, 2^1310120231 is an apocalyptic number.

1310120231 is a deficient number, since it is larger than the sum of its proper divisors (187160041).

1310120231 is an equidigital number, since it uses as much as digits as its factorization.

1310120231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187160040.

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

The square root of 1310120231 is about 36195.5830316352. The cubic root of 1310120231 is about 1094.2176548581.

Adding to 1310120231 its reverse (1320210131), we get a palindrome (2630330362).

The spelling of 1310120231 in words is "one billion, three hundred ten million, one hundred twenty thousand, two hundred thirty-one".