3111242221 has 16 divisors (see below), whose sum is σ = 3260217600. Its totient is φ = 2966645248.

The previous prime is 3111242213. The next prime is 3111242291. The reversal of 3111242221 is 1222421113.

It is a cyclic number.

It is not a de Polignac number, because 3111242221 - 2³ = 3111242213 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 (3111242291) 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 15 ways as a sum of consecutive naturals, for example, 308385 + ... + 318313.

It is an arithmetic number, because the mean of its divisors is an integer number (203763600).

Almost surely, 2^3111242221 is an apocalyptic number.

It is an amenable number.

3111242221 is a deficient number, since it is larger than the sum of its proper divisors (148975379).

3111242221 is a wasteful number, since it uses less digits than its factorization.

3111242221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10148.

The product of its digits is 192, while the sum is 19.

The square root of 3111242221 is about 55778.5103870657. The cubic root of 3111242221 is about 1459.8602200889.

Adding to 3111242221 its reverse (1222421113), we get a palindrome (4333663334).

The spelling of 3111242221 in words is "three billion, one hundred eleven million, two hundred forty-two thousand, two hundred twenty-one".