21210012202022 has 24 divisors (see below), whose sum is σ = 37018843692840. Its totient is φ = 9087662885280.

The previous prime is 21210012202009. The next prime is 21210012202039. The reversal of 21210012202022 is 22020221001212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27502772 + ... + 28263447.

It is an arithmetic number, because the mean of its divisors is an integer number (1542451820535).

Almost surely, 2^{21210012202022} is an apocalyptic number.

21210012202022 is a deficient number, since it is larger than the sum of its proper divisors (15808831490818).

21210012202022 is a wasteful number, since it uses less digits than its factorization.

21210012202022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55770116 (or 55770109 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21210012202022 its reverse (22020221001212), we get a palindrome (43230233203234).

The spelling of 21210012202022 in words is "twenty-one trillion, two hundred ten billion, twelve million, two hundred two thousand, twenty-two".