21202422 has 16 divisors (see below), whose sum is σ = 43867440. Its totient is φ = 6823712.

The previous prime is 21202421. The next prime is 21202427. The reversal of 21202422 is 22420212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60753 + ... + 61100.

It is an arithmetic number, because the mean of its divisors is an integer number (2741715).

Almost surely, 2^21202422 is an apocalyptic number.

21202422 is an abundant number, since it is smaller than the sum of its proper divisors (22665018).

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

21202422 is a wasteful number, since it uses less digits than its factorization.

21202422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121887.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 21202422 is about 4604.6087781700. The cubic root of 21202422 is about 276.7760400452.

Adding to 21202422 its reverse (22420212), we get a palindrome (43622634).

The spelling of 21202422 in words is "twenty-one million, two hundred two thousand, four hundred twenty-two".