1002010120121 has 2 divisors, whose sum is σ = 1002010120122. Its totient is φ = 1002010120120.

The previous prime is 1002010120099. The next prime is 1002010120127. The reversal of 1002010120121 is 1210210102001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 954849482896 + 47160637225 = 977164^2 + 217165^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002010120121 - 2⁶ = 1002010120057 is a prime.

It is not a weakly prime, because it can be changed into another prime (1002010120127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501005060060 + 501005060061.

It is an arithmetic number, because the mean of its divisors is an integer number (501005060061).

Almost surely, 2^{1002010120121} is an apocalyptic number.

It is an amenable number.

1002010120121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002010120121 is an equidigital number, since it uses as much as digits as its factorization.

1002010120121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1002010120121 its reverse (1210210102001), we get a palindrome (2212220222122).

The spelling of 1002010120121 in words is "one trillion, two billion, ten million, one hundred twenty thousand, one hundred twenty-one".