121595501953 has 8 divisors (see below), whose sum is σ = 124628311808. Its totient is φ = 118572010704.

The previous prime is 121595501917. The next prime is 121595501971. The reversal of 121595501953 is 359105595121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121595501953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121595501353) by changing a digit.

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, 2303226 + ... + 2355427.

It is an arithmetic number, because the mean of its divisors is an integer number (15578538976).

Almost surely, 2^121595501953 is an apocalyptic number.

It is an amenable number.

121595501953 is a deficient number, since it is larger than the sum of its proper divisors (3032809855).

121595501953 is an equidigital number, since it uses as much as digits as its factorization.

121595501953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4659303.

The product of its (nonzero) digits is 303750, while the sum is 46.

The spelling of 121595501953 in words is "one hundred twenty-one billion, five hundred ninety-five million, five hundred one thousand, nine hundred fifty-three".