3031111221 has 16 divisors (see below), whose sum is σ = 4065761280. Its totient is φ = 2008629360.

The previous prime is 3031111219. The next prime is 3031111229. The reversal of 3031111221 is 1221111303.

It is a happy number.

3031111221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3031111221 - 2¹ = 3031111219 is a prime.

It is a super-2 number, since 2×3031111221² = 18375270468144221682, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3031111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3031111229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 491326 + ... + 497456.

It is an arithmetic number, because the mean of its divisors is an integer number (254110080).

Almost surely, 2^3031111221 is an apocalyptic number.

It is an amenable number.

3031111221 is a deficient number, since it is larger than the sum of its proper divisors (1034650059).

3031111221 is a wasteful number, since it uses less digits than its factorization.

3031111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7096.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 3031111221 is about 55055.5285234825. The cubic root of 3031111221 is about 1447.2180064619.

Adding to 3031111221 its reverse (1221111303), we get a palindrome (4252222524).

The spelling of 3031111221 in words is "three billion, thirty-one million, one hundred eleven thousand, two hundred twenty-one".