1312322121 has 32 divisors (see below), whose sum is σ = 2133267840. Its totient is φ = 790718400.

The previous prime is 1312322051. The next prime is 1312322131. The reversal of 1312322121 is 1212232131.

It is not a de Polignac number, because 1312322121 - 2²⁵ = 1278767689 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1312322094 and 1312322103.

It is not an unprimeable number, because it can be changed into a prime (1312322131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38611 + ... + 64151.

It is an arithmetic number, because the mean of its divisors is an integer number (66664620).

Almost surely, 2^1312322121 is an apocalyptic number.

1312322121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1312322121 is a deficient number, since it is larger than the sum of its proper divisors (820945719).

1312322121 is a wasteful number, since it uses less digits than its factorization.

1312322121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25734 (or 25728 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1312322121 is about 36225.9868188570. The cubic root of 1312322121 is about 1094.8303208653.

Adding to 1312322121 its reverse (1212232131), we get a palindrome (2524554252).

The spelling of 1312322121 in words is "one billion, three hundred twelve million, three hundred twenty-two thousand, one hundred twenty-one".