120224021 has 4 divisors (see below), whose sum is σ = 120269292. Its totient is φ = 120178752.

The previous prime is 120224011. The next prime is 120224029. The reversal of 120224021 is 120422021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120422021 = 467 ⋅257863.

It can be written as a sum of positive squares in 2 ways, for example, as 97318225 + 22905796 = 9865^2 + 4786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120224021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120223987 and 120224005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120224029) 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, 18386 + ... + 24051.

It is an arithmetic number, because the mean of its divisors is an integer number (30067323).

Almost surely, 2^120224021 is an apocalyptic number.

It is an amenable number.

120224021 is a deficient number, since it is larger than the sum of its proper divisors (45271).

120224021 is an equidigital number, since it uses as much as digits as its factorization.

120224021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45270.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 120224021 is about 10964.6714953071. The cubic root of 120224021 is about 493.5491592281.

Adding to 120224021 its reverse (120422021), we get a palindrome (240646042).

The spelling of 120224021 in words is "one hundred twenty million, two hundred twenty-four thousand, twenty-one".