120111520 has 96 divisors (see below), whose sum is σ = 299593728. Its totient is φ = 45416448.

The previous prime is 120111487. The next prime is 120111527. The reversal of 120111520 is 25111021.

It is a self number, because there is not a number n which added to its sum of digits gives 120111520.

It is not an unprimeable number, because it can be changed into a prime (120111527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 467232 + ... + 467488.

It is an arithmetic number, because the mean of its divisors is an integer number (3120768).

Almost surely, 2^120111520 is an apocalyptic number.

120111520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 120111520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149796864).

120111520 is an abundant number, since it is smaller than the sum of its proper divisors (179482208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120111520 is a wasteful number, since it uses less digits than its factorization.

120111520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422 (or 414 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 120111520 is about 10959.5401363378. The cubic root of 120111520 is about 493.3951630970.

Adding to 120111520 its reverse (25111021), we get a palindrome (145222541).

It can be divided in two parts, 12011 and 1520, that added together give a palindrome (13531).

The spelling of 120111520 in words is "one hundred twenty million, one hundred eleven thousand, five hundred twenty".