3109112221 has 2 divisors, whose sum is σ = 3109112222. Its totient is φ = 3109112220.

The previous prime is 3109112207. The next prime is 3109112263. The reversal of 3109112221 is 1222119013.

3109112221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2654825625 + 454286596 = 51525^2 + 21314^2 .

It is a cyclic number.

It is not a de Polignac number, because 3109112221 - 2²⁵ = 3075557789 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3109112192 and 3109112201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3109112021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1554556110 + 1554556111.

It is an arithmetic number, because the mean of its divisors is an integer number (1554556111).

Almost surely, 2^3109112221 is an apocalyptic number.

It is an amenable number.

3109112221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3109112221 is an equidigital number, since it uses as much as digits as its factorization.

3109112221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 3109112221 is about 55759.4137433313. The cubic root of 3109112221 is about 1459.5269971165.

The spelling of 3109112221 in words is "three billion, one hundred nine million, one hundred twelve thousand, two hundred twenty-one".