121004309 has 2 divisors, whose sum is σ = 121004310. Its totient is φ = 121004308.

The previous prime is 121004281. The next prime is 121004329. The reversal of 121004309 is 903400121.

It is an a-pointer prime, because the next prime (121004329) can be obtained adding 121004309 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120670225 + 334084 = 10985^2 + 578^2 .

It is a cyclic number.

It is not a de Polignac number, because 121004309 - 2¹² = 121000213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121004329) 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 as a sum of consecutive naturals, namely, 60502154 + 60502155.

It is an arithmetic number, because the mean of its divisors is an integer number (60502155).

Almost surely, 2^121004309 is an apocalyptic number.

It is an amenable number.

121004309 is a deficient number, since it is larger than the sum of its proper divisors (1).

121004309 is an equidigital number, since it uses as much as digits as its factorization.

121004309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 121004309 is about 11000.1958618926. The cubic root of 121004309 is about 494.6146155199.

The spelling of 121004309 in words is "one hundred twenty-one million, four thousand, three hundred nine".