21213211202022 has 16 divisors (see below), whose sum is σ = 48487339890432. Its totient is φ = 6060917486280.

The previous prime is 21213211201999. The next prime is 21213211202059. The reversal of 21213211202022 is 22020211231212.

It is a super-4 number, since 4×21213211202022⁴ (a number of 54 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 21213211202022.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252538228554 + ... + 252538228637.

It is an arithmetic number, because the mean of its divisors is an integer number (3030458743152).

Almost surely, 2^{21213211202022} is an apocalyptic number.

21213211202022 is an abundant number, since it is smaller than the sum of its proper divisors (27274128688410).

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

21213211202022 is a wasteful number, since it uses less digits than its factorization.

21213211202022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505076457203.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21213211202022 its reverse (22020211231212), we get a palindrome (43233422433234).

The spelling of 21213211202022 in words is "twenty-one trillion, two hundred thirteen billion, two hundred eleven million, two hundred two thousand, twenty-two".