212100210220122 has 192 divisors, whose sum is σ = 572396305536000. Its totient is φ = 57973607846784.

The previous prime is 212100210220043. The next prime is 212100210220123. The reversal of 212100210220122 is 221022012001212.

It is a happy number.

212100210220122 is a `hidden beast` number, since 2 + 1 + 210 + 0 + 210 + 220 + 1 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 212100210220095 and 212100210220104.

It is not an unprimeable number, because it can be changed into a prime (212100210220123) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4315338 + ... + 21043349.

It is an arithmetic number, because the mean of its divisors is an integer number (2981230758000).

Almost surely, 2^{212100210220122} is an apocalyptic number.

212100210220122 is an abundant number, since it is smaller than the sum of its proper divisors (360296095315878).

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

212100210220122 is a wasteful number, since it uses less digits than its factorization.

212100210220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25358850 (or 25358837 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 212100210220122 its reverse (221022012001212), we get a palindrome (433122222221334).

The spelling of 212100210220122 in words is "two hundred twelve trillion, one hundred billion, two hundred ten million, two hundred twenty thousand, one hundred twenty-two".