1312221312331 has 8 divisors (see below), whose sum is σ = 1312957175904. Its totient is φ = 1311485555520.

The previous prime is 1312221312319. The next prime is 1312221312349. The reversal of 1312221312331 is 1332131222131.

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 1312221312331 - 2¹³ = 1312221304139 is a prime.

It is a super-2 number, since 2×1312221312331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312221312296 and 1312221312305.

It is not an unprimeable number, because it can be changed into a prime (1312221342331) 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, 42269191 + ... + 42300223.

It is an arithmetic number, because the mean of its divisors is an integer number (164119646988).

Almost surely, 2^{1312221312331} is an apocalyptic number.

1312221312331 is a deficient number, since it is larger than the sum of its proper divisors (735863573).

1312221312331 is a wasteful number, since it uses less digits than its factorization.

1312221312331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53381.

The product of its digits is 1296, while the sum is 25.

Adding to 1312221312331 its reverse (1332131222131), we get a palindrome (2644352534462).

The spelling of 1312221312331 in words is "one trillion, three hundred twelve billion, two hundred twenty-one million, three hundred twelve thousand, three hundred thirty-one".