20202211002221 has 16 divisors (see below), whose sum is σ = 20679610625280. Its totient is φ = 19726819738560.

The previous prime is 20202211002203. The next prime is 20202211002251. The reversal of 20202211002221 is 12220011220202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20202211002221 - 2³⁸ = 19927333095277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20202211002221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202211002251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70933115 + ... + 71217351.

It is an arithmetic number, because the mean of its divisors is an integer number (1292475664080).

Almost surely, 2^{20202211002221} is an apocalyptic number.

It is an amenable number.

20202211002221 is a deficient number, since it is larger than the sum of its proper divisors (477399623059).

20202211002221 is a wasteful number, since it uses less digits than its factorization.

20202211002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287764.

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

Adding to 20202211002221 its reverse (12220011220202), we get a palindrome (32422222222423).

The spelling of 20202211002221 in words is "twenty trillion, two hundred two billion, two hundred eleven million, two thousand, two hundred twenty-one".