122100009 has 16 divisors (see below), whose sum is σ = 167650560. Its totient is φ = 78995840.

The previous prime is 122100007. The next prime is 122100029. The reversal of 122100009 is 900001221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 122100009 - 2¹ = 122100007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122100007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21712 + ... + 26750.

It is an arithmetic number, because the mean of its divisors is an integer number (10478160).

Almost surely, 2^122100009 is an apocalyptic number.

It is an amenable number.

122100009 is a deficient number, since it is larger than the sum of its proper divisors (45550551).

122100009 is a wasteful number, since it uses less digits than its factorization.

122100009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5280.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 122100009 is about 11049.8872844930. The cubic root of 122100009 is about 496.1030518297.

The spelling of 122100009 in words is "one hundred twenty-two million, one hundred thousand, nine".