312120002100 has 72 divisors (see below), whose sum is σ = 924068807200. Its totient is φ = 81296369280.

The previous prime is 312120002083. The next prime is 312120002119. The reversal of 312120002100 is 1200021213.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12084775 + ... + 12110574.

Almost surely, 2^312120002100 is an apocalyptic number.

312120002100 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

312120002100 is an abundant number, since it is smaller than the sum of its proper divisors (611948805100).

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

312120002100 is a wasteful number, since it uses less digits than its factorization.

312120002100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24195409 (or 24195402 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 312120002100 its reverse (1200021213), we get a palindrome (313320023313).

The spelling of 312120002100 in words is "three hundred twelve billion, one hundred twenty million, two thousand, one hundred".