2100202221 has 48 divisors (see below), whose sum is σ = 3238625600. Its totient is φ = 1200116736.

The previous prime is 2100202217. The next prime is 2100202249. The reversal of 2100202221 is 1222020012.

It is not a de Polignac number, because 2100202221 - 2² = 2100202217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100202197 and 2100202206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100202211) 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 47 ways as a sum of consecutive naturals, for example, 2080965 + ... + 2081973.

Almost surely, 2^2100202221 is an apocalyptic number.

It is an amenable number.

2100202221 is a deficient number, since it is larger than the sum of its proper divisors (1138423379).

2100202221 is a wasteful number, since it uses less digits than its factorization.

2100202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150 (or 1097 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 2100202221 is about 45827.9633084430. The cubic root of 2100202221 is about 1280.6202684300.

Adding to 2100202221 its reverse (1222020012), we get a palindrome (3322222233).

The spelling of 2100202221 in words is "two billion, one hundred million, two hundred two thousand, two hundred twenty-one".