121751995415 has 8 divisors (see below), whose sum is σ = 146282550288. Its totient is φ = 97281492480.

The previous prime is 121751995363. The next prime is 121751995441. The reversal of 121751995415 is 514599157121.

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 121751995415 - 2⁸ = 121751995159 is a prime.

It is a Duffinian number.

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, 15008522 + ... + 15016631.

It is an arithmetic number, because the mean of its divisors is an integer number (18285318786).

Almost surely, 2^121751995415 is an apocalyptic number.

121751995415 is a deficient number, since it is larger than the sum of its proper divisors (24530554873).

121751995415 is an equidigital number, since it uses as much as digits as its factorization.

121751995415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30025969.

The product of its digits is 567000, while the sum is 50.

The spelling of 121751995415 in words is "one hundred twenty-one billion, seven hundred fifty-one million, nine hundred ninety-five thousand, four hundred fifteen".