2112021002221 has 8 divisors (see below), whose sum is σ = 2286029763864. Its totient is φ = 1939661613120.

The previous prime is 2112021002213. The next prime is 2112021002227. The reversal of 2112021002221 is 1222001202112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 108069330121 + 2003951672100 = 328739^2 + 1415610^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2112021002221 - 2³ = 2112021002213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2112021002195 and 2112021002204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112021002227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412340470 + ... + 412345591.

It is an arithmetic number, because the mean of its divisors is an integer number (285753720483).

Almost surely, 2^{2112021002221} is an apocalyptic number.

It is an amenable number.

2112021002221 is a deficient number, since it is larger than the sum of its proper divisors (174008761643).

2112021002221 is a wasteful number, since it uses less digits than its factorization.

2112021002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824686271.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2112021002221 its reverse (1222001202112), we get a palindrome (3334022204333).

The spelling of 2112021002221 in words is "two trillion, one hundred twelve billion, twenty-one million, two thousand, two hundred twenty-one".