20210000202221 has 4 divisors (see below), whose sum is σ = 20511641996352. Its totient is φ = 19908358408092.

The previous prime is 20210000202193. The next prime is 20210000202257. The reversal of 20210000202221 is 12220200001202.

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 20210000202221 - 2¹⁸ = 20209999940077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20210000202196 and 20210000202205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210000202421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150820896965 + ... + 150820897098.

It is an arithmetic number, because the mean of its divisors is an integer number (5127910499088).

Almost surely, 2^{20210000202221} is an apocalyptic number.

It is an amenable number.

20210000202221 is a deficient number, since it is larger than the sum of its proper divisors (301641794131).

20210000202221 is an equidigital number, since it uses as much as digits as its factorization.

20210000202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301641794130.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20210000202221 its reverse (12220200001202), we get a palindrome (32430200203423).

The spelling of 20210000202221 in words is "twenty trillion, two hundred ten billion, two hundred two thousand, two hundred twenty-one".