1312100120 has 32 divisors (see below), whose sum is σ = 3125887200. Its totient is φ = 493966848.

The previous prime is 1312100117. The next prime is 1312100149. The reversal of 1312100120 is 210012131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 964100 + ... + 965459.

It is an arithmetic number, because the mean of its divisors is an integer number (97683975).

Almost surely, 2^1312100120 is an apocalyptic number.

1312100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312100120 is an abundant number, since it is smaller than the sum of its proper divisors (1813787080).

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

1312100120 is a wasteful number, since it uses less digits than its factorization.

1312100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1929587 (or 1929583 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1312100120 is about 36222.9225767331. The cubic root of 1312100120 is about 1094.7685811625.

Adding to 1312100120 its reverse (210012131), we get a palindrome (1522112251).

The spelling of 1312100120 in words is "one billion, three hundred twelve million, one hundred thousand, one hundred twenty".