2002202002121 has 4 divisors (see below), whose sum is σ = 2071243450500. Its totient is φ = 1933160553744.

The previous prime is 2002202002109. The next prime is 2002202002147. The reversal of 2002202002121 is 1212002022002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1099008368896 + 903193633225 = 1048336^2 + 950365^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002202002121 - 2¹⁰ = 2002202001097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2002202002096 and 2002202002105.

It is not an unprimeable number, because it can be changed into a prime (2002202002621) 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, 34520724146 + ... + 34520724203.

It is an arithmetic number, because the mean of its divisors is an integer number (517810862625).

Almost surely, 2^{2002202002121} is an apocalyptic number.

It is an amenable number.

2002202002121 is a deficient number, since it is larger than the sum of its proper divisors (69041448379).

2002202002121 is an equidigital number, since it uses as much as digits as its factorization.

2002202002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69041448378.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 2002202002121 its reverse (1212002022002), we get a palindrome (3214204024123).

The spelling of 2002202002121 in words is "two trillion, two billion, two hundred two million, two thousand, one hundred twenty-one".