212100210112220 has 12 divisors (see below), whose sum is σ = 445410441235704. Its totient is φ = 84840084044880.

The previous prime is 212100210112171. The next prime is 212100210112223. The reversal of 212100210112220 is 22211012001212.

It is a super-2 number, since 2×212100210112220² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212100210112223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5302505252786 + ... + 5302505252825.

It is an arithmetic number, because the mean of its divisors is an integer number (37117536769642).

Almost surely, 2^{212100210112220} is an apocalyptic number.

212100210112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212100210112220 is an abundant number, since it is smaller than the sum of its proper divisors (233310231123484).

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

212100210112220 is a wasteful number, since it uses less digits than its factorization.

212100210112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10605010505620 (or 10605010505618 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212100210112220 its reverse (22211012001212), we get a palindrome (234311222113432).

The spelling of 212100210112220 in words is "two hundred twelve trillion, one hundred billion, two hundred ten million, one hundred twelve thousand, two hundred twenty".