20202110002221 has 72 divisors (see below), whose sum is σ = 32401255733280. Its totient is φ = 11163134683008.

The previous prime is 20202110002199. The next prime is 20202110002223. The reversal of 20202110002221 is 12220001120202.

It is not a de Polignac number, because 20202110002221 - 2⁷ = 20202110002093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20202110002221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202110002223) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 32494675 + ... + 33110543.

It is an arithmetic number, because the mean of its divisors is an integer number (450017440740).

Almost surely, 2^{20202110002221} is an apocalyptic number.

20202110002221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20202110002221 is a deficient number, since it is larger than the sum of its proper divisors (12199145731059).

20202110002221 is a wasteful number, since it uses less digits than its factorization.

20202110002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616123 (or 616079 counting only the distinct ones).

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

Adding to 20202110002221 its reverse (12220001120202), we get a palindrome (32422111122423).

The spelling of 20202110002221 in words is "twenty trillion, two hundred two billion, one hundred ten million, two thousand, two hundred twenty-one".