20002102000121 has 4 divisors (see below), whose sum is σ = 20002111492752. Its totient is φ = 20002092507492.

The previous prime is 20002102000079. The next prime is 20002102000129. The reversal of 20002102000121 is 12100020120002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20002102000121 - 2³⁸ = 19727224093177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20002102000129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10571 + ... + 6324896.

It is an arithmetic number, because the mean of its divisors is an integer number (5000527873188).

Almost surely, 2^{20002102000121} is an apocalyptic number.

It is an amenable number.

20002102000121 is a deficient number, since it is larger than the sum of its proper divisors (9492631).

20002102000121 is an equidigital number, since it uses as much as digits as its factorization.

20002102000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9492630.

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

Adding to 20002102000121 its reverse (12100020120002), we get a palindrome (32102122120123).

The spelling of 20002102000121 in words is "twenty trillion, two billion, one hundred two million, one hundred twenty-one", and thus it is an aban number.