121335965 has 4 divisors (see below), whose sum is σ = 145603164. Its totient is φ = 97068768.

The previous prime is 121335961. The next prime is 121335979. The reversal of 121335965 is 569533121.

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 37100281 + 84235684 = 6091^2 + 9178^2 .

It is a cyclic number.

It is not a de Polignac number, because 121335965 - 2² = 121335961 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121335961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12133592 + ... + 12133601.

It is an arithmetic number, because the mean of its divisors is an integer number (36400791).

Almost surely, 2^121335965 is an apocalyptic number.

It is an amenable number.

121335965 is a deficient number, since it is larger than the sum of its proper divisors (24267199).

121335965 is an equidigital number, since it uses as much as digits as its factorization.

121335965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24267198.

The product of its digits is 24300, while the sum is 35.

The square root of 121335965 is about 11015.2605507087. The cubic root of 121335965 is about 495.0660932731.

The spelling of 121335965 in words is "one hundred twenty-one million, three hundred thirty-five thousand, nine hundred sixty-five".