2340222221 has 2 divisors, whose sum is σ = 2340222222. Its totient is φ = 2340222220.

The previous prime is 2340222179. The next prime is 2340222253. The reversal of 2340222221 is 1222220432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2210034121 + 130188100 = 47011^2 + 11410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2340222221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2340222193 and 2340222202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2340222281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1170111110 + 1170111111.

It is an arithmetic number, because the mean of its divisors is an integer number (1170111111).

Almost surely, 2^2340222221 is an apocalyptic number.

It is an amenable number.

2340222221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2340222221 is an equidigital number, since it uses as much as digits as its factorization.

2340222221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 2340222221 is about 48375.8433621575. The cubic root of 2340222221 is about 1327.6564191136.

Adding to 2340222221 its reverse (1222220432), we get a palindrome (3562442653).

The spelling of 2340222221 in words is "two billion, three hundred forty million, two hundred twenty-two thousand, two hundred twenty-one".