2002021002121 has 32 divisors (see below), whose sum is σ = 2357961198848. Its totient is φ = 1663894794240.

The previous prime is 2002021002097. The next prime is 2002021002161. The reversal of 2002021002121 is 1212001202002.

It is a happy number.

It is not a de Polignac number, because 2002021002121 - 2¹⁹ = 2002020477833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2002021002161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91151581 + ... + 91173541.

It is an arithmetic number, because the mean of its divisors is an integer number (73686287464).

Almost surely, 2^{2002021002121} is an apocalyptic number.

It is an amenable number.

2002021002121 is a deficient number, since it is larger than the sum of its proper divisors (355940196727).

2002021002121 is a wasteful number, since it uses less digits than its factorization.

2002021002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23201.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2002021002121 its reverse (1212001202002), we get a palindrome (3214022204123).

The spelling of 2002021002121 in words is "two trillion, two billion, twenty-one million, two thousand, one hundred twenty-one".