2120099 has 2 divisors, whose sum is σ = 2120100. Its totient is φ = 2120098.

The previous prime is 2120093. The next prime is 2120101. The reversal of 2120099 is 9900212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120099 is a prime.

Together with 2120101, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2120093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060049 + 1060050.

It is an arithmetic number, because the mean of its divisors is an integer number (1060050).

2^2120099 is an apocalyptic number.

2120099 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120099 is an equidigital number, since it uses as much as digits as its factorization.

2120099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 2120099 is about 1456.0559741988. The cubic root of 2120099 is about 128.4651654026.

It can be divided in two parts, 212009 and 9, that multiplied together give a triangular number (1908081 = T₁₉₅₃).

The spelling of 2120099 in words is "two million, one hundred twenty thousand, ninety-nine".