21222001000122 has 16 divisors (see below), whose sum is σ = 45708925231200. Its totient is φ = 6529846461552.

The previous prime is 21222001000103. The next prime is 21222001000129. The reversal of 21222001000122 is 22100010022212.

It is not an unprimeable number, because it can be changed into a prime (21222001000129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136038467872 + ... + 136038468027.

It is an arithmetic number, because the mean of its divisors is an integer number (2856807826950).

Almost surely, 2^{21222001000122} is an apocalyptic number.

21222001000122 is an abundant number, since it is smaller than the sum of its proper divisors (24486924231078).

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

21222001000122 is a wasteful number, since it uses less digits than its factorization.

21222001000122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272076935917.

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

Adding to 21222001000122 its reverse (22100010022212), we get a palindrome (43322011022334).

The spelling of 21222001000122 in words is "twenty-one trillion, two hundred twenty-two billion, one million, one hundred twenty-two", and thus it is an aban number.