212100122110020 has 96 divisors (see below), whose sum is σ = 625223822361600. Its totient is φ = 53575764142464.

The previous prime is 212100122110003. The next prime is 212100122110027. The reversal of 212100122110020 is 20011221001212.

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

It is not an unprimeable number, because it can be changed into a prime (212100122110027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4656664 + ... + 21115983.

It is an arithmetic number, because the mean of its divisors is an integer number (6512748149600).

Almost surely, 2^{212100122110020} is an apocalyptic number.

212100122110020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212100122110020 is an abundant number, since it is smaller than the sum of its proper divisors (413123700251580).

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

212100122110020 is a wasteful number, since it uses less digits than its factorization.

212100122110020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25779897 (or 25779895 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212100122110020 its reverse (20011221001212), we get a palindrome (232111343111232).

The spelling of 212100122110020 in words is "two hundred twelve trillion, one hundred billion, one hundred twenty-two million, one hundred ten thousand, twenty".