121079209 has 2 divisors, whose sum is σ = 121079210. Its totient is φ = 121079208.

The previous prime is 121079201. The next prime is 121079213. The reversal of 121079209 is 902970121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98307225 + 22771984 = 9915^2 + 4772^2 .

It is a cyclic number.

It is not a de Polignac number, because 121079209 - 2³ = 121079201 is a prime.

It is not a weakly prime, because it can be changed into another prime (121079201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60539604 + 60539605.

It is an arithmetic number, because the mean of its divisors is an integer number (60539605).

Almost surely, 2^121079209 is an apocalyptic number.

It is an amenable number.

121079209 is a deficient number, since it is larger than the sum of its proper divisors (1).

121079209 is an equidigital number, since it uses as much as digits as its factorization.

121079209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 121079209 is about 11003.5998200589. The cubic root of 121079209 is about 494.7166476812.

It can be divided in two parts, 12107 and 9209, that added together give a square (21316 = 146²).

The spelling of 121079209 in words is "one hundred twenty-one million, seventy-nine thousand, two hundred nine".