20120312012100 has 72 divisors (see below), whose sum is σ = 58357104177120. Its totient is φ = 5352298126080.

The previous prime is 20120312012093. The next prime is 20120312012137. The reversal of 20120312012100 is 121021302102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20120312012100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81867162 + ... + 82112561.

Almost surely, 2^{20120312012100} is an apocalyptic number.

20120312012100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120312012100 is an abundant number, since it is smaller than the sum of its proper divisors (38236792165020).

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

20120312012100 is a wasteful number, since it uses less digits than its factorization.

20120312012100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163980149 (or 163980142 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20120312012100 its reverse (121021302102), we get a palindrome (20241333314202).

The spelling of 20120312012100 in words is "twenty trillion, one hundred twenty billion, three hundred twelve million, twelve thousand, one hundred".