12120441054549 has 4 divisors (see below), whose sum is σ = 16160588072736. Its totient is φ = 8080294036364.

The previous prime is 12120441054523. The next prime is 12120441054583. The reversal of 12120441054549 is 94545014402121.

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 12120441054549 - 2⁵ = 12120441054517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12120441054549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120441054509) 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, 2020073509089 + ... + 2020073509094.

It is an arithmetic number, because the mean of its divisors is an integer number (4040147018184).

Almost surely, 2^{12120441054549} is an apocalyptic number.

It is an amenable number.

12120441054549 is a deficient number, since it is larger than the sum of its proper divisors (4040147018187).

12120441054549 is an equidigital number, since it uses as much as digits as its factorization.

12120441054549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4040147018186.

The product of its (nonzero) digits is 230400, while the sum is 42.

The spelling of 12120441054549 in words is "twelve trillion, one hundred twenty billion, four hundred forty-one million, fifty-four thousand, five hundred forty-nine".