2002002121221 has 4 divisors (see below), whose sum is σ = 2669336161632. Its totient is φ = 1334668080812.

The previous prime is 2002002121181. The next prime is 2002002121267. The reversal of 2002002121221 is 1221212002002.

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 2002002121221 - 2⁶ = 2002002121157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2002002121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002002121921) 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, 333667020201 + ... + 333667020206.

It is an arithmetic number, because the mean of its divisors is an integer number (667334040408).

Almost surely, 2^{2002002121221} is an apocalyptic number.

It is an amenable number.

2002002121221 is a deficient number, since it is larger than the sum of its proper divisors (667334040411).

2002002121221 is an equidigital number, since it uses as much as digits as its factorization.

2002002121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667334040410.

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

Adding to 2002002121221 its reverse (1221212002002), we get a palindrome (3223214123223).

The spelling of 2002002121221 in words is "two trillion, two billion, two million, one hundred twenty-one thousand, two hundred twenty-one".