2001021010099 has 2 divisors, whose sum is σ = 2001021010100. Its totient is φ = 2001021010098.

The previous prime is 2001021010067. The next prime is 2001021010103. The reversal of 2001021010099 is 9900101201002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2001021010099 - 2⁵ = 2001021010067 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001021010019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000510505049 + 1000510505050.

It is an arithmetic number, because the mean of its divisors is an integer number (1000510505050).

Almost surely, 2^{2001021010099} is an apocalyptic number.

2001021010099 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001021010099 is an equidigital number, since it uses as much as digits as its factorization.

2001021010099 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 2001021010099 in words is "two trillion, one billion, twenty-one million, ten thousand, ninety-nine".