122099309 has 4 divisors (see below), whose sum is σ = 126309660. Its totient is φ = 117888960.

The previous prime is 122099303. The next prime is 122099311. The reversal of 122099309 is 903990221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 903990221 = 173 ⋅5225377.

It can be written as a sum of positive squares in 2 ways, for example, as 93508900 + 28590409 = 9670^2 + 5347^2 .

It is a cyclic number.

It is not a de Polignac number, because 122099309 - 2¹⁶ = 122033773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122099303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2105132 + ... + 2105189.

It is an arithmetic number, because the mean of its divisors is an integer number (31577415).

Almost surely, 2^122099309 is an apocalyptic number.

It is an amenable number.

122099309 is a deficient number, since it is larger than the sum of its proper divisors (4210351).

122099309 is an equidigital number, since it uses as much as digits as its factorization.

122099309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4210350.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 122099309 is about 11049.8556099164. The cubic root of 122099309 is about 496.1021037741.

The spelling of 122099309 in words is "one hundred twenty-two million, ninety-nine thousand, three hundred nine".