122100121209 has 16 divisors (see below), whose sum is σ = 177623444160. Its totient is φ = 73990378560.

The previous prime is 122100121189. The next prime is 122100121219. The reversal of 122100121209 is 902121001221.

It is not a de Polignac number, because 122100121209 - 2⁵ = 122100121177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122100121219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17487 + ... + 494475.

It is an arithmetic number, because the mean of its divisors is an integer number (11101465260).

Almost surely, 2^122100121209 is an apocalyptic number.

It is an amenable number.

122100121209 is a deficient number, since it is larger than the sum of its proper divisors (55523322951).

122100121209 is a wasteful number, since it uses less digits than its factorization.

122100121209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484760.

The product of its (nonzero) digits is 144, while the sum is 21.

It can be divided in two parts, 12210012 and 1209, that added together give a palindrome (12211221).

The spelling of 122100121209 in words is "one hundred twenty-two billion, one hundred million, one hundred twenty-one thousand, two hundred nine".