121366265 has 4 divisors (see below), whose sum is σ = 145639524. Its totient is φ = 97093008.

The previous prime is 121366249. The next prime is 121366277. The reversal of 121366265 is 562663121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 562663121 = 239 ⋅2354239.

It can be written as a sum of positive squares in 2 ways, for example, as 27741289 + 93624976 = 5267^2 + 9676^2 .

It is a cyclic number.

It is not a de Polignac number, because 121366265 - 2⁴ = 121366249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12136622 + ... + 12136631.

It is an arithmetic number, because the mean of its divisors is an integer number (36409881).

Almost surely, 2^121366265 is an apocalyptic number.

It is an amenable number.

121366265 is a deficient number, since it is larger than the sum of its proper divisors (24273259).

121366265 is an equidigital number, since it uses as much as digits as its factorization.

121366265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24273258.

The product of its digits is 12960, while the sum is 32.

The square root of 121366265 is about 11016.6358295080. The cubic root of 121366265 is about 495.1072991216.

The spelling of 121366265 in words is "one hundred twenty-one million, three hundred sixty-six thousand, two hundred sixty-five".