1312321023112 has 128 divisors (see below), whose sum is σ = 2842134220800. Its totient is φ = 562709977600.

The previous prime is 1312321023109. The next prime is 1312321023149. The reversal of 1312321023112 is 2113201232131.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14028189 + ... + 14121427.

It is an arithmetic number, because the mean of its divisors is an integer number (22204173600).

Almost surely, 2^{1312321023112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312321023112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1421067110400).

1312321023112 is an abundant number, since it is smaller than the sum of its proper divisors (1529813197688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1312321023112 is a wasteful number, since it uses less digits than its factorization.

1312321023112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93427 (or 93423 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1312321023112 its reverse (2113201232131), we get a palindrome (3425522255243).

The spelling of 1312321023112 in words is "one trillion, three hundred twelve billion, three hundred twenty-one million, twenty-three thousand, one hundred twelve".