21102210222 has 16 divisors (see below), whose sum is σ = 43345080912. Its totient is φ = 6843960000.

The previous prime is 21102210221. The next prime is 21102210247. The reversal of 21102210222 is 22201220112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102210221) 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, 47527279 + ... + 47527722.

It is an arithmetic number, because the mean of its divisors is an integer number (2709067557).

Almost surely, 2^21102210222 is an apocalyptic number.

21102210222 is an abundant number, since it is smaller than the sum of its proper divisors (22242870690).

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

21102210222 is a wasteful number, since it uses less digits than its factorization.

21102210222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95055043.

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

Adding to 21102210222 its reverse (22201220112), we get a palindrome (43303430334).

The spelling of 21102210222 in words is "twenty-one billion, one hundred two million, two hundred ten thousand, two hundred twenty-two".