122009999 has 2 divisors, whose sum is σ = 122010000. Its totient is φ = 122009998.

The previous prime is 122009977. The next prime is 122010013. The reversal of 122009999 is 999900221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 122009999 - 2⁸ = 122009743 is a prime.

It is a Chen prime.

It is equal to p_6949580 and since 122009999 and 6949580 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122009939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61004999 + 61005000.

It is an arithmetic number, because the mean of its divisors is an integer number (61005000).

Almost surely, 2^122009999 is an apocalyptic number.

122009999 is a deficient number, since it is larger than the sum of its proper divisors (1).

122009999 is an equidigital number, since it uses as much as digits as its factorization.

122009999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 122009999 is about 11045.8136413756. The cubic root of 122009999 is about 495.9811156854.

The spelling of 122009999 in words is "one hundred twenty-two million, nine thousand, nine hundred ninety-nine".