21202112022 has 32 divisors (see below), whose sum is σ = 52189815552. Its totient is φ = 5591765664.

The previous prime is 21202111999. The next prime is 21202112051. The reversal of 21202112022 is 22021120212.

It is a junction number, because it is equal to n+sod(n) for n = 21202111992 and 21202112010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19415308 + ... + 19416399.

It is an arithmetic number, because the mean of its divisors is an integer number (1630931736).

Almost surely, 2^21202112022 is an apocalyptic number.

21202112022 is an abundant number, since it is smaller than the sum of its proper divisors (30987703530).

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

21202112022 is a wasteful number, since it uses less digits than its factorization.

21202112022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38831732.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21202112022 its reverse (22021120212), we get a palindrome (43223232234).

The spelling of 21202112022 in words is "twenty-one billion, two hundred two million, one hundred twelve thousand, twenty-two".