21221010002022 has 16 divisors (see below), whose sum is σ = 42442878722880. Its totient is φ = 7073526880872.

The previous prime is 21221010002011. The next prime is 21221010002053. The reversal of 21221010002022 is 22020001012212.

It is a junction number, because it is equal to n+sod(n) for n = 21221010001992 and 21221010002010.

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, 35458468 + ... + 36051975.

It is an arithmetic number, because the mean of its divisors is an integer number (2652679920180).

Almost surely, 2^{21221010002022} is an apocalyptic number.

21221010002022 is an abundant number, since it is smaller than the sum of its proper divisors (21221868720858).

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

21221010002022 is a wasteful number, since it uses less digits than its factorization.

21221010002022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71559907.

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

Adding to 21221010002022 its reverse (22020001012212), we get a palindrome (43241011014234).

The spelling of 21221010002022 in words is "twenty-one trillion, two hundred twenty-one billion, ten million, two thousand, twenty-two".