2112102221221 has 4 divisors (see below), whose sum is σ = 2112375569472. Its totient is φ = 2111828872972.

The previous prime is 2112102221213. The next prime is 2112102221263. The reversal of 2112102221221 is 1221222012112.

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 2112102221221 - 2³ = 2112102221213 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 (2112102221521) 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, 136662535 + ... + 136677988.

It is an arithmetic number, because the mean of its divisors is an integer number (528093892368).

Almost surely, 2^{2112102221221} is an apocalyptic number.

It is an amenable number.

2112102221221 is a deficient number, since it is larger than the sum of its proper divisors (273348251).

2112102221221 is an equidigital number, since it uses as much as digits as its factorization.

2112102221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273348250.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2112102221221 its reverse (1221222012112), we get a palindrome (3333324233333).

The spelling of 2112102221221 in words is "two trillion, one hundred twelve billion, one hundred two million, two hundred twenty-one thousand, two hundred twenty-one".