21233445222 has 32 divisors (see below), whose sum is σ = 46492424064. Its totient is φ = 6411473600.

The previous prime is 21233445161. The next prime is 21233445227. The reversal of 21233445222 is 22254433212.

It is a self number, because there is not a number n which added to its sum of digits gives 21233445222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233445227) 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, 553908 + ... + 590999.

It is an arithmetic number, because the mean of its divisors is an integer number (1452888252).

Almost surely, 2^21233445222 is an apocalyptic number.

21233445222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21233445222 is an abundant number, since it is smaller than the sum of its proper divisors (25258978842).

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

21233445222 is a wasteful number, since it uses less digits than its factorization.

21233445222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145204.

The product of its digits is 23040, while the sum is 30.

Adding to 21233445222 its reverse (22254433212), we get a palindrome (43487878434).

The spelling of 21233445222 in words is "twenty-one billion, two hundred thirty-three million, four hundred forty-five thousand, two hundred twenty-two".