21222220221022 has 32 divisors (see below), whose sum is σ = 32690177632224. Its totient is φ = 10326789043200.

The previous prime is 21222220221011. The next prime is 21222220221031. The reversal of 21222220221022 is 22012202222212.

It is a super-2 number, since 2×21222220221022² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21222220220984 and 21222220221002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94785718 + ... + 95009350.

It is an arithmetic number, because the mean of its divisors is an integer number (1021568051007).

Almost surely, 2^{21222220221022} is an apocalyptic number.

21222220221022 is a deficient number, since it is larger than the sum of its proper divisors (11467957411202).

21222220221022 is a wasteful number, since it uses less digits than its factorization.

21222220221022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226524.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 21222220221022 its reverse (22012202222212), we get a palindrome (43234422443234).

The spelling of 21222220221022 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty million, two hundred twenty-one thousand, twenty-two".