21022212220122 has 16 divisors (see below), whose sum is σ = 42086595389472. Its totient is φ = 7000375581840.

The previous prime is 21022212220099. The next prime is 21022212220157. The reversal of 21022212220122 is 22102221222012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1757116404 + ... + 1757128367.

It is an arithmetic number, because the mean of its divisors is an integer number (2630412211842).

Almost surely, 2^{21022212220122} is an apocalyptic number.

21022212220122 is an abundant number, since it is smaller than the sum of its proper divisors (21064383169350).

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

21022212220122 is a wasteful number, since it uses less digits than its factorization.

21022212220122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3514245773.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21022212220122 its reverse (22102221222012), we get a palindrome (43124433442134).

It can be divided in two parts, 2102221222012 and 2, that multiplied together give a palindrome (4204442444024).

The spelling of 21022212220122 in words is "twenty-one trillion, twenty-two billion, two hundred twelve million, two hundred twenty thousand, one hundred twenty-two".