120342203553 has 128 divisors (see below), whose sum is σ = 206057779200. Its totient is φ = 61346073600.

The previous prime is 120342203543. The next prime is 120342203557. The reversal of 120342203553 is 355302243021.

It is not a de Polignac number, because 120342203553 - 2¹² = 120342199457 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 120342203553.

It is not an unprimeable number, because it can be changed into a prime (120342203557) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 73513051 + ... + 73514687.

It is an arithmetic number, because the mean of its divisors is an integer number (1609826400).

Almost surely, 2^120342203553 is an apocalyptic number.

120342203553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

120342203553 is a deficient number, since it is larger than the sum of its proper divisors (85715575647).

120342203553 is a wasteful number, since it uses less digits than its factorization.

120342203553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023.

The product of its (nonzero) digits is 21600, while the sum is 30.

Adding to 120342203553 its reverse (355302243021), we get a palindrome (475644446574).

The spelling of 120342203553 in words is "one hundred twenty billion, three hundred forty-two million, two hundred three thousand, five hundred fifty-three".