122012111009 has 2 divisors, whose sum is σ = 122012111010. Its totient is φ = 122012111008.

The previous prime is 122012110999. The next prime is 122012111071. The reversal of 122012111009 is 900111210221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64062141025 + 57949969984 = 253105^2 + 240728^2 .

It is a cyclic number.

It is not a de Polignac number, because 122012111009 - 2²⁸ = 121743675553 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (122012110009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61006055504 + 61006055505.

It is an arithmetic number, because the mean of its divisors is an integer number (61006055505).

Almost surely, 2^122012111009 is an apocalyptic number.

It is an amenable number.

122012111009 is a deficient number, since it is larger than the sum of its proper divisors (1).

122012111009 is an equidigital number, since it uses as much as digits as its factorization.

122012111009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 122012111009 in words is "one hundred twenty-two billion, twelve million, one hundred eleven thousand, nine".