121318765 has 8 divisors (see below), whose sum is σ = 147633408. Its totient is φ = 95687760.

The previous prime is 121318759. The next prime is 121318789. The reversal of 121318765 is 567813121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121318765 - 2⁵ = 121318733 is a prime.

It is a super-2 number, since 2×121318765² = 29436485482250450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121318765.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 170517 + ... + 171226.

It is an arithmetic number, because the mean of its divisors is an integer number (18454176).

Almost surely, 2^121318765 is an apocalyptic number.

It is an amenable number.

121318765 is a deficient number, since it is larger than the sum of its proper divisors (26314643).

121318765 is an equidigital number, since it uses as much as digits as its factorization.

121318765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341819.

The product of its digits is 10080, while the sum is 34.

The square root of 121318765 is about 11014.4797879882. The cubic root of 121318765 is about 495.0426994421.

The spelling of 121318765 in words is "one hundred twenty-one million, three hundred eighteen thousand, seven hundred sixty-five".