21210220000122 has 32 divisors (see below), whose sum is σ = 42759010892160. Its totient is φ = 7013848934400.

The previous prime is 21210220000111. The next prime is 21210220000171. The reversal of 21210220000122 is 22100002201212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25094379 + ... + 25925822.

It is an arithmetic number, because the mean of its divisors is an integer number (1336219090380).

Almost surely, 2^{21210220000122} is an apocalyptic number.

21210220000122 is an abundant number, since it is smaller than the sum of its proper divisors (21548790892038).

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

21210220000122 is a wasteful number, since it uses less digits than its factorization.

21210220000122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51020758.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21210220000122 its reverse (22100002201212), we get a palindrome (43310222201334).

The spelling of 21210220000122 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty million, one hundred twenty-two", and thus it is an aban number.