1310431121 has 12 divisors (see below), whose sum is σ = 1390357200. Its totient is φ = 1231677720.

The previous prime is 1310431117. The next prime is 1310431139. The reversal of 1310431121 is 1211340131.

It is not a de Polignac number, because 1310431121 - 2² = 1310431117 is a prime.

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 1310431121.

It is not an unprimeable number, because it can be changed into a prime (1310431181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 324050 + ... + 328068.

It is an arithmetic number, because the mean of its divisors is an integer number (115863100).

Almost surely, 2^1310431121 is an apocalyptic number.

It is an amenable number.

1310431121 is a deficient number, since it is larger than the sum of its proper divisors (79926079).

1310431121 is an equidigital number, since it uses as much as digits as its factorization.

1310431121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4300 (or 4169 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1310431121 is about 36199.8773616707. The cubic root of 1310431121 is about 1094.3042002031.

Adding to 1310431121 its reverse (1211340131), we get a palindrome (2521771252).

The spelling of 1310431121 in words is "one billion, three hundred ten million, four hundred thirty-one thousand, one hundred twenty-one".