121753748159 has 4 divisors (see below), whose sum is σ = 121911257016. Its totient is φ = 121596239304.

The previous prime is 121753748141. The next prime is 121753748203. The reversal of 121753748159 is 951847357121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 951847357121 = 5741 ⋅165798181.

It is a cyclic number.

It is not a de Polignac number, because 121753748159 - 2²⁰ = 121752699583 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 121753748159.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121753741159) 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, 78753269 + ... + 78754814.

It is an arithmetic number, because the mean of its divisors is an integer number (30477814254).

Almost surely, 2^121753748159 is an apocalyptic number.

121753748159 is a deficient number, since it is larger than the sum of its proper divisors (157508857).

121753748159 is an equidigital number, since it uses as much as digits as its factorization.

121753748159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157508856.

The product of its digits is 2116800, while the sum is 53.

The spelling of 121753748159 in words is "one hundred twenty-one billion, seven hundred fifty-three million, seven hundred forty-eight thousand, one hundred fifty-nine".