122120012009 has 4 divisors (see below), whose sum is σ = 122121018180. Its totient is φ = 122119005840.

The previous prime is 122120011903. The next prime is 122120012029. The reversal of 122120012009 is 900210021221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 75403512409 + 46716499600 = 274597^2 + 216140^2 .

It is a cyclic number.

It is not a de Polignac number, because 122120012009 - 2¹² = 122120007913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122120012029) 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, 291314 + ... + 573675.

It is an arithmetic number, because the mean of its divisors is an integer number (30530254545).

Almost surely, 2^122120012009 is an apocalyptic number.

It is an amenable number.

122120012009 is a deficient number, since it is larger than the sum of its proper divisors (1006171).

122120012009 is an equidigital number, since it uses as much as digits as its factorization.

122120012009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006170.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 122120012009 in words is "one hundred twenty-two billion, one hundred twenty million, twelve thousand, nine".