120113553 has 24 divisors (see below), whose sum is σ = 188131008. Its totient is φ = 67961376.

The previous prime is 120113549. The next prime is 120113569. The reversal of 120113553 is 355311021.

It is not a de Polignac number, because 120113553 - 2² = 120113549 is a prime.

It is a super-2 number, since 2×120113553² = 28854531228567618, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (120113593) 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, 11175 + ... + 19107.

It is an arithmetic number, because the mean of its divisors is an integer number (7838792).

Almost surely, 2^120113553 is an apocalyptic number.

It is an amenable number.

120113553 is a deficient number, since it is larger than the sum of its proper divisors (68017455).

120113553 is a wasteful number, since it uses less digits than its factorization.

120113553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8053 (or 8046 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 120113553 is about 10959.6328861874. The cubic root of 120113553 is about 493.3979468065.

Adding to 120113553 its reverse (355311021), we get a palindrome (475424574).

The spelling of 120113553 in words is "one hundred twenty million, one hundred thirteen thousand, five hundred fifty-three".