1312303222331 has 8 divisors (see below), whose sum is σ = 1381407912720. Its totient is φ = 1243202141952.

The previous prime is 1312303222291. The next prime is 1312303222339. The reversal of 1312303222331 is 1332223032131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312303222331 is a prime.

It is a super-2 number, since 2×1312303222331² (a number of 25 digits) contains 22 as substring.

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 1312303222331.

It is not an unprimeable number, because it can be changed into a prime (1312303222339) 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, 139790 + ... + 1626083.

It is an arithmetic number, because the mean of its divisors is an integer number (172675989090).

Almost surely, 2^{1312303222331} is an apocalyptic number.

1312303222331 is a deficient number, since it is larger than the sum of its proper divisors (69104690389).

1312303222331 is a wasteful number, since it uses less digits than its factorization.

1312303222331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1805005.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 1312303222331 its reverse (1332223032131), we get a palindrome (2644526254462).

The spelling of 1312303222331 in words is "one trillion, three hundred twelve billion, three hundred three million, two hundred twenty-two thousand, three hundred thirty-one".