21220202022 has 16 divisors (see below), whose sum is σ = 44674109760. Its totient is φ = 6701116392.

The previous prime is 21220201999. The next prime is 21220202039. The reversal of 21220202022 is 22020202212.

It is a junction number, because it is equal to n+sod(n) for n = 21220201992 and 21220202010.

It is a congruent number.

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, 93070948 + ... + 93071175.

It is an arithmetic number, because the mean of its divisors is an integer number (2792131860).

Almost surely, 2^21220202022 is an apocalyptic number.

21220202022 is an abundant number, since it is smaller than the sum of its proper divisors (23453907738).

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

21220202022 is a wasteful number, since it uses less digits than its factorization.

21220202022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186142147.

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

Adding to 21220202022 its reverse (22020202212), we get a palindrome (43240404234).

The spelling of 21220202022 in words is "twenty-one billion, two hundred twenty million, two hundred two thousand, twenty-two".