212100403120 has 20 divisors (see below), whose sum is σ = 493133437440. Its totient is φ = 84840161216.

The previous prime is 212100403063. The next prime is 212100403139. The reversal of 212100403120 is 21304001212.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 212100403094 and 212100403103.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1325627440 + ... + 1325627599.

It is an arithmetic number, because the mean of its divisors is an integer number (24656671872).

Almost surely, 2^212100403120 is an apocalyptic number.

212100403120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212100403120 is an abundant number, since it is smaller than the sum of its proper divisors (281033034320).

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

212100403120 is a wasteful number, since it uses less digits than its factorization.

212100403120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2651255052 (or 2651255046 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 212100403120 its reverse (21304001212), we get a palindrome (233404404332).

The spelling of 212100403120 in words is "two hundred twelve billion, one hundred million, four hundred three thousand, one hundred twenty".