3120013221 has 32 divisors (see below), whose sum is σ = 4599450240. Its totient is φ = 1869122304.

The previous prime is 3120013207. The next prime is 3120013223. The reversal of 3120013221 is 1223100213.

It is not a de Polignac number, because 3120013221 - 2⁶ = 3120013157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3120013221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3120013223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 528675 + ... + 534543.

It is an arithmetic number, because the mean of its divisors is an integer number (143732820).

Almost surely, 2^3120013221 is an apocalyptic number.

It is an amenable number.

3120013221 is a deficient number, since it is larger than the sum of its proper divisors (1479437019).

3120013221 is a wasteful number, since it uses less digits than its factorization.

3120013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6245.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 3120013221 is about 55857.0785218848. The cubic root of 3120013221 is about 1461.2307787952.

Adding to 3120013221 its reverse (1223100213), we get a palindrome (4343113434).

The spelling of 3120013221 in words is "three billion, one hundred twenty million, thirteen thousand, two hundred twenty-one".