2021021100199 has 2 divisors, whose sum is σ = 2021021100200. Its totient is φ = 2021021100198.

The previous prime is 2021021100187. The next prime is 2021021100257. The reversal of 2021021100199 is 9910011201202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021021100199 - 2²³ = 2021012711591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021021100169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010510550099 + 1010510550100.

It is an arithmetic number, because the mean of its divisors is an integer number (1010510550100).

Almost surely, 2^{2021021100199} is an apocalyptic number.

2021021100199 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021021100199 is an equidigital number, since it uses as much as digits as its factorization.

2021021100199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 2021021100199 in words is "two trillion, twenty-one billion, twenty-one million, one hundred thousand, one hundred ninety-nine".