102001021099 has 2 divisors, whose sum is σ = 102001021100. Its totient is φ = 102001021098.

The previous prime is 102001021063. The next prime is 102001021123. The reversal of 102001021099 is 990120100201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102001021099 is a prime.

It is not a weakly prime, because it can be changed into another prime (102001021009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51000510549 + 51000510550.

It is an arithmetic number, because the mean of its divisors is an integer number (51000510550).

Almost surely, 2^102001021099 is an apocalyptic number.

102001021099 is a deficient number, since it is larger than the sum of its proper divisors (1).

102001021099 is an equidigital number, since it uses as much as digits as its factorization.

102001021099 is an evil number, because the sum of its binary digits is even.

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

The spelling of 102001021099 in words is "one hundred two billion, one million, twenty-one thousand, ninety-nine".