121752365543 has 4 divisors (see below), whose sum is σ = 122425030728. Its totient is φ = 121079700360.

The previous prime is 121752365533. The next prime is 121752365549. The reversal of 121752365543 is 345563257121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121752365543 - 2²² = 121748171239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121752365494 and 121752365503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121752365549) 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, 336332321 + ... + 336332682.

It is an arithmetic number, because the mean of its divisors is an integer number (30606257682).

Almost surely, 2^121752365543 is an apocalyptic number.

121752365543 is a deficient number, since it is larger than the sum of its proper divisors (672665185).

121752365543 is an equidigital number, since it uses as much as digits as its factorization.

121752365543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672665184.

The product of its digits is 756000, while the sum is 44.

The spelling of 121752365543 in words is "one hundred twenty-one billion, seven hundred fifty-two million, three hundred sixty-five thousand, five hundred forty-three".