21202022 has 4 divisors (see below), whose sum is σ = 31803036. Its totient is φ = 10601010.

The previous prime is 21202003. The next prime is 21202033. The reversal of 21202022 is 22020212.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21201994 and 21202012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5300504 + ... + 5300507.

It is an arithmetic number, because the mean of its divisors is an integer number (7950759).

Almost surely, 2^21202022 is an apocalyptic number.

21202022 is a deficient number, since it is larger than the sum of its proper divisors (10601014).

21202022 is a wasteful number, since it uses less digits than its factorization.

21202022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10601013.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 21202022 is about 4604.5653432219. The cubic root of 21202022 is about 276.7742995033.

Adding to 21202022 its reverse (22020212), we get a palindrome (43222234).

The spelling of 21202022 in words is "twenty-one million, two hundred two thousand, twenty-two".