121002122009 has 2 divisors, whose sum is σ = 121002122010. Its totient is φ = 121002122008.

The previous prime is 121002121897. The next prime is 121002122053. The reversal of 121002122009 is 900221200121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74951107984 + 46051014025 = 273772^2 + 214595^2 .

It is a cyclic number.

It is not a de Polignac number, because 121002122009 - 2²⁴ = 120985344793 is a prime.

It is not a weakly prime, because it can be changed into another prime (121002122089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60501061004 + 60501061005.

It is an arithmetic number, because the mean of its divisors is an integer number (60501061005).

Almost surely, 2^121002122009 is an apocalyptic number.

It is an amenable number.

121002122009 is a deficient number, since it is larger than the sum of its proper divisors (1).

121002122009 is an equidigital number, since it uses as much as digits as its factorization.

121002122009 is an evil number, because the sum of its binary digits is even.

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

The spelling of 121002122009 in words is "one hundred twenty-one billion, two million, one hundred twenty-two thousand, nine".