21222001110 has 32 divisors (see below), whose sum is σ = 50952424032. Its totient is φ = 5657020160.

The previous prime is 21222001109. The next prime is 21222001127. The reversal of 21222001110 is 1110022212.

It is a super-2 number, since 2×21222001110² (a number of 21 digits) contains 22 as substring.

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, 56319 + ... + 213578.

It is an arithmetic number, because the mean of its divisors is an integer number (1592263251).

Almost surely, 2^21222001110 is an apocalyptic number.

21222001110 is an abundant number, since it is smaller than the sum of its proper divisors (29730422922).

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

21222001110 is a wasteful number, since it uses less digits than its factorization.

21222001110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272528.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21222001110 its reverse (1110022212), we get a palindrome (22332023322).

The spelling of 21222001110 in words is "twenty-one billion, two hundred twenty-two million, one thousand, one hundred ten".