99020100121 has 2 divisors, whose sum is σ = 99020100122. Its totient is φ = 99020100120.

The previous prime is 99020100059. The next prime is 99020100139. The reversal of 99020100121 is 12100102099.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82835171721 + 16184928400 = 287811^2 + 127220^2 .

It is a cyclic number.

It is not a de Polignac number, because 99020100121 - 2⁹ = 99020099609 is a prime.

It is not a weakly prime, because it can be changed into another prime (99020100721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49510050060 + 49510050061.

It is an arithmetic number, because the mean of its divisors is an integer number (49510050061).

Almost surely, 2^99020100121 is an apocalyptic number.

It is an amenable number.

99020100121 is a deficient number, since it is larger than the sum of its proper divisors (1).

99020100121 is an equidigital number, since it uses as much as digits as its factorization.

99020100121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 25.

The spelling of 99020100121 in words is "ninety-nine billion, twenty million, one hundred thousand, one hundred twenty-one".