20202112110221 has 4 divisors (see below), whose sum is σ = 20445511051392. Its totient is φ = 19958713169052.

The previous prime is 20202112110199. The next prime is 20202112110223. The reversal of 20202112110221 is 12201121120202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20202112110221 - 2³⁴ = 20184932241037 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 20202112110221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202112110223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121699470461 + ... + 121699470626.

It is an arithmetic number, because the mean of its divisors is an integer number (5111377762848).

Almost surely, 2^{20202112110221} is an apocalyptic number.

It is an amenable number.

20202112110221 is a deficient number, since it is larger than the sum of its proper divisors (243398941171).

20202112110221 is an equidigital number, since it uses as much as digits as its factorization.

20202112110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243398941170.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20202112110221 its reverse (12201121120202), we get a palindrome (32403233230423).

The spelling of 20202112110221 in words is "twenty trillion, two hundred two billion, one hundred twelve million, one hundred ten thousand, two hundred twenty-one".