21002202022 has 16 divisors (see below), whose sum is σ = 32166594720. Its totient is φ = 10282295232.

The previous prime is 21002201977. The next prime is 21002202041. The reversal of 21002202022 is 22020220012.

It is a junction number, because it is equal to n+sod(n) for n = 21002201993 and 21002202011.

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, 554433 + ... + 591100.

It is an arithmetic number, because the mean of its divisors is an integer number (2010412170).

Almost surely, 2^21002202022 is an apocalyptic number.

21002202022 is a deficient number, since it is larger than the sum of its proper divisors (11164392698).

21002202022 is a wasteful number, since it uses less digits than its factorization.

21002202022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145727.

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 21002202022 its reverse (22020220012), we get a palindrome (43022422034).

The spelling of 21002202022 in words is "twenty-one billion, two million, two hundred two thousand, twenty-two".