121752105529 has 4 divisors (see below), whose sum is σ = 121756539520. Its totient is φ = 121747671540.

The previous prime is 121752105521. The next prime is 121752105661. The reversal of 121752105529 is 925501257121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121752105529 - 2³ = 121752105521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121752105491 and 121752105500.

It is not an unprimeable number, because it can be changed into a prime (121752105521) 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, 2175549 + ... + 2230810.

It is an arithmetic number, because the mean of its divisors is an integer number (30439134880).

Almost surely, 2^121752105529 is an apocalyptic number.

It is an amenable number.

121752105529 is a deficient number, since it is larger than the sum of its proper divisors (4433991).

121752105529 is an equidigital number, since it uses as much as digits as its factorization.

121752105529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4433990.

The product of its (nonzero) digits is 63000, while the sum is 40.

The spelling of 121752105529 in words is "one hundred twenty-one billion, seven hundred fifty-two million, one hundred five thousand, five hundred twenty-nine".