120011550 has 24 divisors (see below), whose sum is σ = 297629016. Its totient is φ = 32003040.

The previous prime is 120011531. The next prime is 120011561. The reversal of 120011550 is 55110021.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 399889 + ... + 400188.

It is an arithmetic number, because the mean of its divisors is an integer number (12401209).

Almost surely, 2^120011550 is an apocalyptic number.

120011550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

120011550 is an abundant number, since it is smaller than the sum of its proper divisors (177617466).

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

120011550 is a wasteful number, since it uses less digits than its factorization.

120011550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800092 (or 800087 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 120011550 is about 10954.9783203802. The cubic root of 120011550 is about 493.2582392192.

Adding to 120011550 its reverse (55110021), we get a palindrome (175121571).

The spelling of 120011550 in words is "one hundred twenty million, eleven thousand, five hundred fifty".