121233786265 has 4 divisors (see below), whose sum is σ = 145480543524. Its totient is φ = 96987029008.

The previous prime is 121233786257. The next prime is 121233786277. The reversal of 121233786265 is 562687332121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12727449856 + 108506336409 = 112816^2 + 329403^2 .

It is a cyclic number.

It is not a de Polignac number, because 121233786265 - 2³ = 121233786257 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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12123378622 + ... + 12123378631.

It is an arithmetic number, because the mean of its divisors is an integer number (36370135881).

Almost surely, 2^121233786265 is an apocalyptic number.

It is an amenable number.

121233786265 is a deficient number, since it is larger than the sum of its proper divisors (24246757259).

121233786265 is an equidigital number, since it uses as much as digits as its factorization.

121233786265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24246757258.

The product of its digits is 725760, while the sum is 46.

The spelling of 121233786265 in words is "one hundred twenty-one billion, two hundred thirty-three million, seven hundred eighty-six thousand, two hundred sixty-five".