2100111020221 has 4 divisors (see below), whose sum is σ = 2210643179200. Its totient is φ = 1989578861244.

The previous prime is 2100111020219. The next prime is 2100111020299. The reversal of 2100111020221 is 1220201110012.

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 2100111020221 - 2¹ = 2100111020219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100111020201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55266079461 + ... + 55266079498.

It is an arithmetic number, because the mean of its divisors is an integer number (552660794800).

Almost surely, 2^{2100111020221} is an apocalyptic number.

It is an amenable number.

2100111020221 is a deficient number, since it is larger than the sum of its proper divisors (110532158979).

2100111020221 is a wasteful number, since it uses less digits than its factorization.

2100111020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110532158978.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2100111020221 its reverse (1220201110012), we get a palindrome (3320312130233).

The spelling of 2100111020221 in words is "two trillion, one hundred billion, one hundred eleven million, twenty thousand, two hundred twenty-one".