1312012311204 has 96 divisors (see below), whose sum is σ = 3567118383360. Its totient is φ = 367539614208.

The previous prime is 1312012311173. The next prime is 1312012311229. The reversal of 1312012311204 is 4021132102131.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 6548142 + ... + 6745530.

It is an arithmetic number, because the mean of its divisors is an integer number (37157483160).

Almost surely, 2^{1312012311204} is an apocalyptic number.

1312012311204 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312012311204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1783559191680).

1312012311204 is an abundant number, since it is smaller than the sum of its proper divisors (2255106072156).

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

1312012311204 is a wasteful number, since it uses less digits than its factorization.

1312012311204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198949 (or 198947 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1312012311204 its reverse (4021132102131), we get a palindrome (5333144413335).

The spelling of 1312012311204 in words is "one trillion, three hundred twelve billion, twelve million, three hundred eleven thousand, two hundred four".