120243311566 has 48 divisors (see below), whose sum is σ = 210666733200. Its totient is φ = 51323424768.

The previous prime is 120243311563. The next prime is 120243311567. The reversal of 120243311566 is 665113342021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120243311563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29916705 + ... + 29920723.

It is an arithmetic number, because the mean of its divisors is an integer number (4388890275).

Almost surely, 2^120243311566 is an apocalyptic number.

120243311566 is a deficient number, since it is larger than the sum of its proper divisors (90423421634).

120243311566 is a wasteful number, since it uses less digits than its factorization.

120243311566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5201 (or 5194 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

Adding to 120243311566 its reverse (665113342021), we get a palindrome (785356653587).

The spelling of 120243311566 in words is "one hundred twenty billion, two hundred forty-three million, three hundred eleven thousand, five hundred sixty-six".