3111244221 has 4 divisors (see below), whose sum is σ = 4148325632. Its totient is φ = 2074162812.

The previous prime is 3111244217. The next prime is 3111244223. The reversal of 3111244221 is 1224421113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1224421113 = 3 ⋅408140371.

It is not a de Polignac number, because 3111244221 - 2² = 3111244217 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 (3111244223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 518540701 + ... + 518540706.

It is an arithmetic number, because the mean of its divisors is an integer number (1037081408).

Almost surely, 2^3111244221 is an apocalyptic number.

It is an amenable number.

3111244221 is a deficient number, since it is larger than the sum of its proper divisors (1037081411).

3111244221 is a wasteful number, since it uses less digits than its factorization.

3111244221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037081410.

The product of its digits is 384, while the sum is 21.

The square root of 3111244221 is about 55778.5283151142. The cubic root of 3111244221 is about 1459.8605329028.

Adding to 3111244221 its reverse (1224421113), we get a palindrome (4335665334).

The spelling of 3111244221 in words is "three billion, one hundred eleven million, two hundred forty-four thousand, two hundred twenty-one".