120106521 has 6 divisors (see below), whose sum is σ = 173487210. Its totient is φ = 80071008.

The previous prime is 120106517. The next prime is 120106523. The reversal of 120106521 is 125601021.

120106521 is a `hidden beast` number, since 1 + 2 + 0 + 10 + 652 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 79923600 + 40182921 = 8940^2 + 6339^2 .

It is not a de Polignac number, because 120106521 - 2² = 120106517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120106494 and 120106503.

It is not an unprimeable number, because it can be changed into a prime (120106523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6672576 + ... + 6672593.

It is an arithmetic number, because the mean of its divisors is an integer number (28914535).

Almost surely, 2^120106521 is an apocalyptic number.

It is an amenable number.

120106521 is a deficient number, since it is larger than the sum of its proper divisors (53380689).

120106521 is a wasteful number, since it uses less digits than its factorization.

120106521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13345175 (or 13345172 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 120106521 is about 10959.3120678262. The cubic root of 120106521 is about 493.3883180233.

Adding to 120106521 its reverse (125601021), we get a palindrome (245707542).

The spelling of 120106521 in words is "one hundred twenty million, one hundred six thousand, five hundred twenty-one".