102001000121 has 2 divisors, whose sum is σ = 102001000122. Its totient is φ = 102001000120.

The previous prime is 102001000109. The next prime is 102001000147. The reversal of 102001000121 is 121000100201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88732494400 + 13268505721 = 297880^2 + 115189^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102001000121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102001000099 and 102001000108.

It is not a weakly prime, because it can be changed into another prime (102001050121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51000500060 + 51000500061.

It is an arithmetic number, because the mean of its divisors is an integer number (51000500061).

Almost surely, 2^102001000121 is an apocalyptic number.

It is an amenable number.

102001000121 is a deficient number, since it is larger than the sum of its proper divisors (1).

102001000121 is an equidigital number, since it uses as much as digits as its factorization.

102001000121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 102001000121 its reverse (121000100201), we get a palindrome (223001100322).

The spelling of 102001000121 in words is "one hundred two billion, one million, one hundred twenty-one", and thus it is an aban number.