120111553 has 4 divisors (see below), whose sum is σ = 120139200. Its totient is φ = 120083908.

The previous prime is 120111529. The next prime is 120111611. The reversal of 120111553 is 355111021.

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 120111553 - 2¹⁷ = 119980481 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120111553.

It is not an unprimeable number, because it can be changed into a prime (120111053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5725 + ... + 16522.

It is an arithmetic number, because the mean of its divisors is an integer number (30034800).

Almost surely, 2^120111553 is an apocalyptic number.

It is an amenable number.

120111553 is a deficient number, since it is larger than the sum of its proper divisors (27647).

120111553 is an equidigital number, since it uses as much as digits as its factorization.

120111553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27646.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 120111553 is about 10959.5416418754. The cubic root of 120111553 is about 493.3952082829.

Adding to 120111553 its reverse (355111021), we get a palindrome (475222574).

The spelling of 120111553 in words is "one hundred twenty million, one hundred eleven thousand, five hundred fifty-three".