121995306887999 has 8 divisors (see below), whose sum is σ = 122519617732512. Its totient is φ = 121471002247680.

The previous prime is 121995306887989. The next prime is 121995306888001. The reversal of 121995306887999 is 999788603599121.

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

It is a cyclic number.

It is not a de Polignac number, because 121995306887999 - 2¹⁶ = 121995306822463 is a prime.

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 121995306887999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121995306887959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40278959 + ... + 43201679.

It is an arithmetic number, because the mean of its divisors is an integer number (15314952216564).

Almost surely, 2^{121995306887999} is an apocalyptic number.

121995306887999 is a deficient number, since it is larger than the sum of its proper divisors (524310844513).

121995306887999 is a wasteful number, since it uses less digits than its factorization.

121995306887999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3102097.

The product of its (nonzero) digits is 4761711360, while the sum is 86.

The spelling of 121995306887999 in words is "one hundred twenty-one trillion, nine hundred ninety-five billion, three hundred six million, eight hundred eighty-seven thousand, nine hundred ninety-nine".