2100202102221 has 4 divisors (see below), whose sum is σ = 2800269469632. Its totient is φ = 1400134734812.

The previous prime is 2100202102213. The next prime is 2100202102247. The reversal of 2100202102221 is 1222012020012.

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 2100202102221 - 2³ = 2100202102213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2100202102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100202302221) 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, 350033683701 + ... + 350033683706.

It is an arithmetic number, because the mean of its divisors is an integer number (700067367408).

Almost surely, 2^{2100202102221} is an apocalyptic number.

It is an amenable number.

2100202102221 is a deficient number, since it is larger than the sum of its proper divisors (700067367411).

2100202102221 is an equidigital number, since it uses as much as digits as its factorization.

2100202102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700067367410.

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

Adding to 2100202102221 its reverse (1222012020012), we get a palindrome (3322214122233).

The spelling of 2100202102221 in words is "two trillion, one hundred billion, two hundred two million, one hundred two thousand, two hundred twenty-one".