100200020019991 has 2 divisors, whose sum is σ = 100200020019992. Its totient is φ = 100200020019990.

The previous prime is 100200020019977. The next prime is 100200020020027. The reversal of 100200020019991 is 199910020002001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100200020019991 - 2⁹ = 100200020019479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100200020019901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50100010009995 + 50100010009996.

It is an arithmetic number, because the mean of its divisors is an integer number (50100010009996).

Almost surely, 2^{100200020019991} is an apocalyptic number.

100200020019991 is a deficient number, since it is larger than the sum of its proper divisors (1).

100200020019991 is an equidigital number, since it uses as much as digits as its factorization.

100200020019991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 34.

The spelling of 100200020019991 in words is "one hundred trillion, two hundred billion, twenty million, nineteen thousand, nine hundred ninety-one".