1312012421444 has 48 divisors (see below), whose sum is σ = 2444959566000. Its totient is φ = 615027818496.

The previous prime is 1312012421399. The next prime is 1312012421507. The reversal of 1312012421444 is 4441242102131.

It can be written as a sum of positive squares in 8 ways, for example, as 143209264900 + 1168803156544 = 378430^2 + 1081112^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 503669 + ... + 1696380.

It is an arithmetic number, because the mean of its divisors is an integer number (50936657625).

Almost surely, 2^{1312012421444} is an apocalyptic number.

It is an amenable number.

1312012421444 is a deficient number, since it is larger than the sum of its proper divisors (1132947144556).

1312012421444 is a wasteful number, since it uses less digits than its factorization.

1312012421444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200232 (or 2200230 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 1312012421444 its reverse (4441242102131), we get a palindrome (5753254523575).

The spelling of 1312012421444 in words is "one trillion, three hundred twelve billion, twelve million, four hundred twenty-one thousand, four hundred forty-four".