2021311099 has 2 divisors, whose sum is σ = 2021311100. Its totient is φ = 2021311098.

The previous prime is 2021311091. The next prime is 2021311109. The reversal of 2021311099 is 9901131202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021311099 - 2³ = 2021311091 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021311091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010655549 + 1010655550.

It is an arithmetic number, because the mean of its divisors is an integer number (1010655550).

Almost surely, 2^2021311099 is an apocalyptic number.

2021311099 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021311099 is an equidigital number, since it uses as much as digits as its factorization.

2021311099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 2021311099 is about 44958.9935274356. The cubic root of 2021311099 is about 1264.3802989885.

The spelling of 2021311099 in words is "two billion, twenty-one million, three hundred eleven thousand, ninety-nine".