121266259 has 4 divisors (see below), whose sum is σ = 121482216. Its totient is φ = 121050304.

The previous prime is 121266209. The next prime is 121266269. The reversal of 121266259 is 952662121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 952662121 = 53 ⋅17974757.

It is a cyclic number.

It is not a de Polignac number, because 121266259 - 2¹⁵ = 121233491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121266209) 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 in 3 ways as a sum of consecutive naturals, for example, 107134 + ... + 108259.

It is an arithmetic number, because the mean of its divisors is an integer number (30370554).

Almost surely, 2^121266259 is an apocalyptic number.

121266259 is a deficient number, since it is larger than the sum of its proper divisors (215957).

121266259 is an equidigital number, since it uses as much as digits as its factorization.

121266259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215956.

The product of its digits is 12960, while the sum is 34.

The square root of 121266259 is about 11012.0960311832. The cubic root of 121266259 is about 494.9712720123.

The spelling of 121266259 in words is "one hundred twenty-one million, two hundred sixty-six thousand, two hundred fifty-nine".