1312120445200 has 120 divisors (see below), whose sum is σ = 3513477042720. Its totient is φ = 467976038400.

The previous prime is 1312120445173. The next prime is 1312120445201. The reversal of 1312120445200 is 25440212131.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (1312120445201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4948666 + ... + 5207065.

It is an arithmetic number, because the mean of its divisors is an integer number (29278975356).

Almost surely, 2^{1312120445200} is an apocalyptic number.

1312120445200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312120445200 is an abundant number, since it is smaller than the sum of its proper divisors (2201356597520).

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

1312120445200 is a wasteful number, since it uses less digits than its factorization.

1312120445200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10155785 (or 10155774 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 1312120445200 its reverse (25440212131), we get a palindrome (1337560657331).

The spelling of 1312120445200 in words is "one trillion, three hundred twelve billion, one hundred twenty million, four hundred forty-five thousand, two hundred".