21222012021202 has 64 divisors (see below), whose sum is σ = 34834067573760. Its totient is φ = 9653225472000.

The previous prime is 21222012021191. The next prime is 21222012021227. The reversal of 21222012021202 is 20212021022212.

It is a self number, because there is not a number n which added to its sum of digits gives 21222012021202.

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 31 ways as a sum of consecutive naturals, for example, 4420329202 + ... + 4420334002.

It is an arithmetic number, because the mean of its divisors is an integer number (544282305840).

Almost surely, 2^{21222012021202} is an apocalyptic number.

21222012021202 is a deficient number, since it is larger than the sum of its proper divisors (13612055552558).

21222012021202 is a wasteful number, since it uses less digits than its factorization.

21222012021202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8947.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21222012021202 its reverse (20212021022212), we get a palindrome (41434033043414).

The spelling of 21222012021202 in words is "twenty-one trillion, two hundred twenty-two billion, twelve million, twenty-one thousand, two hundred two".