2120099999 has 2 divisors, whose sum is σ = 2120100000. Its totient is φ = 2120099998.

The previous prime is 2120099977. The next prime is 2120100023. The reversal of 2120099999 is 9999900212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2120099999 - 2²⁴ = 2103322783 is a prime.

2120099999 is a modest number, since divided by 99999 gives 21200 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120099599) 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, 1060049999 + 1060050000.

It is an arithmetic number, because the mean of its divisors is an integer number (1060050000).

Almost surely, 2^2120099999 is an apocalyptic number.

2120099999 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120099999 is an equidigital number, since it uses as much as digits as its factorization.

2120099999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 236196, while the sum is 50.

The square root of 2120099999 is about 46044.5436398277. The cubic root of 2120099999 is about 1284.6518558039.

The spelling of 2120099999 in words is "two billion, one hundred twenty million, ninety-nine thousand, nine hundred ninety-nine".