212120002021122 has 24 divisors (see below), whose sum is σ = 494946671383164. Its totient is φ = 65267692929504.

The previous prime is 212120002021111. The next prime is 212120002021133. The reversal of 212120002021122 is 221120200021212.

It is a happy number.

212120002021122 is a `hidden beast` number, since 212 + 1 + 200 + 0 + 20 + 211 + 22 = 666.

It is an interprime number because it is at equal distance from previous prime (212120002021111) and next prime (212120002021133).

It can be written as a sum of positive squares in 2 ways, for example, as 196550277690321 + 15569724330801 = 14019639^2 + 3945849^2 .

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 = 212120002021095 and 212120002021104.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 453247867333 + ... + 453247867800.

Almost surely, 2^{212120002021122} is an apocalyptic number.

212120002021122 is an abundant number, since it is smaller than the sum of its proper divisors (282826669362042).

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

212120002021122 is a wasteful number, since it uses less digits than its factorization.

212120002021122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906495735154 (or 906495735151 counting only the distinct ones).

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

Adding to 212120002021122 its reverse (221120200021212), we get a palindrome (433240202042334).

The spelling of 212120002021122 in words is "two hundred twelve trillion, one hundred twenty billion, two million, twenty-one thousand, one hundred twenty-two".