2002001122221 has 8 divisors (see below), whose sum is σ = 2672726617824. Its totient is φ = 1332971520720.

The previous prime is 2002001122201. The next prime is 2002001122237. The reversal of 2002001122221 is 1222211002002.

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

It is not a de Polignac number, because 2002001122221 - 2⁶ = 2002001122157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2002001122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002001122201) 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, 423970770 + ... + 423975491.

It is an arithmetic number, because the mean of its divisors is an integer number (334090827228).

Almost surely, 2^{2002001122221} is an apocalyptic number.

It is an amenable number.

2002001122221 is a deficient number, since it is larger than the sum of its proper divisors (670725495603).

2002001122221 is an equidigital number, since it uses as much as digits as its factorization.

2002001122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847947051.

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

Adding to 2002001122221 its reverse (1222211002002), we get a palindrome (3224212124223).

The spelling of 2002001122221 in words is "two trillion, two billion, one million, one hundred twenty-two thousand, two hundred twenty-one".