120224521 has 4 divisors (see below), whose sum is σ = 120276292. Its totient is φ = 120172752.

The previous prime is 120224509. The next prime is 120224563. The reversal of 120224521 is 125422021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125422021 = 19 ⋅6601159.

It can be written as a sum of positive squares in 2 ways, for example, as 117418896 + 2805625 = 10836^2 + 1675^2 .

It is a cyclic number.

It is not a de Polignac number, because 120224521 - 2⁹ = 120224009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120224591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22230 + ... + 27103.

It is an arithmetic number, because the mean of its divisors is an integer number (30069073).

Almost surely, 2^120224521 is an apocalyptic number.

It is an amenable number.

120224521 is a deficient number, since it is larger than the sum of its proper divisors (51771).

120224521 is an equidigital number, since it uses as much as digits as its factorization.

120224521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51770.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 120224521 is about 10964.6942957841. The cubic root of 120224521 is about 493.5498434348.

Adding to 120224521 its reverse (125422021), we get a palindrome (245646542).

The spelling of 120224521 in words is "one hundred twenty million, two hundred twenty-four thousand, five hundred twenty-one".