1317308121 has 24 divisors (see below), whose sum is σ = 2017008864. Its totient is φ = 825601920.

The previous prime is 1317308107. The next prime is 1317308123. The reversal of 1317308121 is 1218037131.

It is a happy number.

It is not a de Polignac number, because 1317308121 - 2⁵ = 1317308089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1317308123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 144130 + ... + 152996.

It is an arithmetic number, because the mean of its divisors is an integer number (84042036).

Almost surely, 2^1317308121 is an apocalyptic number.

It is an amenable number.

1317308121 is a deficient number, since it is larger than the sum of its proper divisors (699700743).

1317308121 is a wasteful number, since it uses less digits than its factorization.

1317308121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9861 (or 9858 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 1317308121 is about 36294.7395775200. The cubic root of 1317308121 is about 1096.2151244589.

The spelling of 1317308121 in words is "one billion, three hundred seventeen million, three hundred eight thousand, one hundred twenty-one".