2102002000121 has 2 divisors, whose sum is σ = 2102002000122. Its totient is φ = 2102002000120.

The previous prime is 2102002000103. The next prime is 2102002000157. The reversal of 2102002000121 is 1210002002012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1076065976896 + 1025936023225 = 1037336^2 + 1012885^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102002000121 - 2¹⁴ = 2102001983737 is a prime.

It is a super-3 number, since 3×2102002000121³ (a number of 38 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (2102002000321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051001000060 + 1051001000061.

It is an arithmetic number, because the mean of its divisors is an integer number (1051001000061).

Almost surely, 2^{2102002000121} is an apocalyptic number.

It is an amenable number.

2102002000121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102002000121 is an equidigital number, since it uses as much as digits as its factorization.

2102002000121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2102002000121 its reverse (1210002002012), we get a palindrome (3312004002133).

The spelling of 2102002000121 in words is "two trillion, one hundred two billion, two million, one hundred twenty-one", and thus it is an aban number.