2021102099999 has 2 divisors, whose sum is σ = 2021102100000. Its totient is φ = 2021102099998.

The previous prime is 2021102099993. The next prime is 2021102100049. The reversal of 2021102099999 is 9999902011202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021102099999 - 2⁸ = 2021102099743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2021102099999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021102099993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010551049999 + 1010551050000.

It is an arithmetic number, because the mean of its divisors is an integer number (1010551050000).

Almost surely, 2^{2021102099999} is an apocalyptic number.

2021102099999 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021102099999 is an equidigital number, since it uses as much as digits as its factorization.

2021102099999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 472392, while the sum is 53.

The spelling of 2021102099999 in words is "two trillion, twenty-one billion, one hundred two million, ninety-nine thousand, nine hundred ninety-nine".