121552049849 has 4 divisors (see below), whose sum is σ = 122231111760. Its totient is φ = 120872987940.

The previous prime is 121552049821. The next prime is 121552049873. The reversal of 121552049849 is 948940255121.

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 121552049849 - 2¹² = 121552045753 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121552049797 and 121552049806.

It is not an unprimeable number, because it can be changed into a prime (121552039849) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 339530687 + ... + 339531044.

It is an arithmetic number, because the mean of its divisors is an integer number (30557777940).

Almost surely, 2^121552049849 is an apocalyptic number.

It is an amenable number.

121552049849 is a deficient number, since it is larger than the sum of its proper divisors (679061911).

121552049849 is an equidigital number, since it uses as much as digits as its factorization.

121552049849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679061910.

The product of its (nonzero) digits is 1036800, while the sum is 50.

The spelling of 121552049849 in words is "one hundred twenty-one billion, five hundred fifty-two million, forty-nine thousand, eight hundred forty-nine".