21242422202 has 16 divisors (see below), whose sum is σ = 33391725120. Its totient is φ = 10115811552.

The previous prime is 21242422177. The next prime is 21242422247. The reversal of 21242422202 is 20222424212.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 980252 + ... + 1001687.

It is an arithmetic number, because the mean of its divisors is an integer number (2086982820).

Almost surely, 2^21242422202 is an apocalyptic number.

21242422202 is a deficient number, since it is larger than the sum of its proper divisors (12149302918).

21242422202 is a wasteful number, since it uses less digits than its factorization.

21242422202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982197.

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 21242422202 its reverse (20222424212), we get a palindrome (41464846414).

The spelling of 21242422202 in words is "twenty-one billion, two hundred forty-two million, four hundred twenty-two thousand, two hundred two".