22221012210 has 16 divisors (see below), whose sum is σ = 53330429376. Its totient is φ = 5925603248.

The previous prime is 22221012199. The next prime is 22221012211. The reversal of 22221012210 is 1221012222.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 22221012210.

It is not an unprimeable number, because it can be changed into a prime (22221012211) 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, 370350174 + ... + 370350233.

It is an arithmetic number, because the mean of its divisors is an integer number (3333151836).

Almost surely, 2^22221012210 is an apocalyptic number.

22221012210 is an abundant number, since it is smaller than the sum of its proper divisors (31109417166).

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

22221012210 is a wasteful number, since it uses less digits than its factorization.

22221012210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740700417.

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

Adding to 22221012210 its reverse (1221012222), we get a palindrome (23442024432).

The spelling of 22221012210 in words is "twenty-two billion, two hundred twenty-one million, twelve thousand, two hundred ten".