2122001002221 has 4 divisors (see below), whose sum is σ = 2829334669632. Its totient is φ = 1414667334812.

The previous prime is 2122001002211. The next prime is 2122001002229. The reversal of 2122001002221 is 1222001002212.

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 2122001002221 - 2¹⁴ = 2122000985837 is a prime.

It is a super-3 number, since 3×2122001002221³ (a number of 38 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2122001002221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122001002229) 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, 353666833701 + ... + 353666833706.

It is an arithmetic number, because the mean of its divisors is an integer number (707333667408).

Almost surely, 2^{2122001002221} is an apocalyptic number.

It is an amenable number.

2122001002221 is a deficient number, since it is larger than the sum of its proper divisors (707333667411).

2122001002221 is an equidigital number, since it uses as much as digits as its factorization.

2122001002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707333667410.

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

Adding to 2122001002221 its reverse (1222001002212), we get a palindrome (3344002004433).

Subtracting from 2122001002221 its reverse (1222001002212), we obtain a palindrome (900000000009).

The spelling of 2122001002221 in words is "two trillion, one hundred twenty-two billion, one million, two thousand, two hundred twenty-one".