1312323121 has 8 divisors (see below), whose sum is σ = 1402781184. Its totient is φ = 1224648480.

The previous prime is 1312323119. The next prime is 1312323197. The reversal of 1312323121 is 1213232131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1312323121 - 2¹ = 1312323119 is a prime.

It is a super-2 number, since 2×1312323121² = 3444383947822361282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312323101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 694881 + ... + 696766.

It is an arithmetic number, because the mean of its divisors is an integer number (175347648).

Almost surely, 2^1312323121 is an apocalyptic number.

It is an amenable number.

1312323121 is a deficient number, since it is larger than the sum of its proper divisors (90458063).

1312323121 is a wasteful number, since it uses less digits than its factorization.

1312323121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391711.

The product of its digits is 216, while the sum is 19.

The square root of 1312323121 is about 36226.0006211009. Note that the first 3 decimals coincide. The cubic root of 1312323121 is about 1094.8305989550.

Adding to 1312323121 its reverse (1213232131), we get a palindrome (2525555252).

The spelling of 1312323121 in words is "one billion, three hundred twelve million, three hundred twenty-three thousand, one hundred twenty-one".