21222022222111 has 16 divisors (see below), whose sum is σ = 21441119515200. Its totient is φ = 21003375686400.

The previous prime is 21222022222109. The next prime is 21222022222123. The reversal of 21222022222111 is 11122222022212.

It is a cyclic number.

It is not a de Polignac number, because 21222022222111 - 2¹ = 21222022222109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222022223111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 879803131 + ... + 879827251.

It is an arithmetic number, because the mean of its divisors is an integer number (1340069969700).

Almost surely, 2^{21222022222111} is an apocalyptic number.

21222022222111 is a deficient number, since it is larger than the sum of its proper divisors (219097293089).

21222022222111 is a wasteful number, since it uses less digits than its factorization.

21222022222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33090.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 21222022222111 its reverse (11122222022212), we get a palindrome (32344244244323).

The spelling of 21222022222111 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-two million, two hundred twenty-two thousand, one hundred eleven".