3120224021 has 4 divisors (see below), whose sum is σ = 3138260172. Its totient is φ = 3102187872.

The previous prime is 3120223991. The next prime is 3120224039. The reversal of 3120224021 is 1204220213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1204220213 = 7 ⋅172031459.

It can be written as a sum of positive squares in 2 ways, for example, as 1603121521 + 1517102500 = 40039^2 + 38950^2 .

It is a cyclic number.

It is not a de Polignac number, because 3120224021 - 2⁶ = 3120223957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3120224221) 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, 9017816 + ... + 9018161.

It is an arithmetic number, because the mean of its divisors is an integer number (784565043).

Almost surely, 2^3120224021 is an apocalyptic number.

It is an amenable number.

3120224021 is a deficient number, since it is larger than the sum of its proper divisors (18036151).

3120224021 is a wasteful number, since it uses less digits than its factorization.

3120224021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18036150.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 3120224021 is about 55858.9654487084. The cubic root of 3120224021 is about 1461.2636868300.

Adding to 3120224021 its reverse (1204220213), we get a palindrome (4324444234).

The spelling of 3120224021 in words is "three billion, one hundred twenty million, two hundred twenty-four thousand, twenty-one".