120115521 has 8 divisors (see below), whose sum is σ = 177948960. Its totient is φ = 80076996.

The previous prime is 120115459. The next prime is 120115537. The reversal of 120115521 is 125511021.

It is not a de Polignac number, because 120115521 - 2⁷ = 120115393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120115494 and 120115503.

It is not an unprimeable number, because it can be changed into a prime (120115561) 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 7 ways as a sum of consecutive naturals, for example, 2224335 + ... + 2224388.

It is an arithmetic number, because the mean of its divisors is an integer number (22243620).

Almost surely, 2^120115521 is an apocalyptic number.

It is an amenable number.

120115521 is a deficient number, since it is larger than the sum of its proper divisors (57833439).

120115521 is an equidigital number, since it uses as much as digits as its factorization.

120115521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4448732 (or 4448726 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 120115521 is about 10959.7226698489. The cubic root of 120115521 is about 493.4006414839.

Adding to 120115521 its reverse (125511021), we get a palindrome (245626542).

The spelling of 120115521 in words is "one hundred twenty million, one hundred fifteen thousand, five hundred twenty-one".