2002020322121 has 2 divisors, whose sum is σ = 2002020322122. Its totient is φ = 2002020322120.

The previous prime is 2002020322091. The next prime is 2002020322139. The reversal of 2002020322121 is 1212230202002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1973463040000 + 28557282121 = 1404800^2 + 168989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2002020322121 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2002020322121.

It is not a weakly prime, because it can be changed into another prime (2002020322721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001010161060 + 1001010161061.

It is an arithmetic number, because the mean of its divisors is an integer number (1001010161061).

Almost surely, 2^{2002020322121} is an apocalyptic number.

It is an amenable number.

2002020322121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002020322121 is an equidigital number, since it uses as much as digits as its factorization.

2002020322121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 2002020322121 its reverse (1212230202002), we get a palindrome (3214250524123).

The spelling of 2002020322121 in words is "two trillion, two billion, twenty million, three hundred twenty-two thousand, one hundred twenty-one".