1312122331 has 32 divisors (see below), whose sum is σ = 1502645760. Its totient is φ = 1136678400.

The previous prime is 1312122277. The next prime is 1312122341. The reversal of 1312122331 is 1332212131.

It is not a de Polignac number, because 1312122331 - 2²¹ = 1310025179 is a prime.

It is a super-2 number, since 2×1312122331² = 3443330023017747122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312122299 and 1312122308.

It is not an unprimeable number, because it can be changed into a prime (1312122341) 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, 5444371 + ... + 5444611.

It is an arithmetic number, because the mean of its divisors is an integer number (46957680).

Almost surely, 2^1312122331 is an apocalyptic number.

1312122331 is a deficient number, since it is larger than the sum of its proper divisors (190523429).

1312122331 is a wasteful number, since it uses less digits than its factorization.

1312122331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547.

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

The square root of 1312122331 is about 36223.2291630661. The cubic root of 1312122331 is about 1094.7747584777.

Adding to 1312122331 its reverse (1332212131), we get a palindrome (2644334462).

The spelling of 1312122331 in words is "one billion, three hundred twelve million, one hundred twenty-two thousand, three hundred thirty-one".