122019909 has 12 divisors (see below), whose sum is σ = 178828608. Its totient is φ = 73951240.

The previous prime is 122019901. The next prime is 122019959. The reversal of 122019909 is 909910221.

It is not a de Polignac number, because 122019909 - 2³ = 122019901 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 122019909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122019901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 167709 + ... + 168434.

It is an arithmetic number, because the mean of its divisors is an integer number (14902384).

Almost surely, 2^122019909 is an apocalyptic number.

It is an amenable number.

122019909 is a deficient number, since it is larger than the sum of its proper divisors (56808699).

122019909 is a wasteful number, since it uses less digits than its factorization.

122019909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336168 (or 336157 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 122019909 is about 11046.2622185063. The cubic root of 122019909 is about 495.9945436553.

The spelling of 122019909 in words is "one hundred twenty-two million, nineteen thousand, nine hundred nine".