2212721243 has 2 divisors, whose sum is σ = 2212721244. Its totient is φ = 2212721242.

The previous prime is 2212721201. The next prime is 2212721339. The reversal of 2212721243 is 3421272122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2212721243 - 2¹² = 2212717147 is a prime.

It is a super-2 number, since 2×2212721243² = 9792270598446930098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2212721143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106360621 + 1106360622.

It is an arithmetic number, because the mean of its divisors is an integer number (1106360622).

Almost surely, 2^2212721243 is an apocalyptic number.

2212721243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2212721243 is an equidigital number, since it uses as much as digits as its factorization.

2212721243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 26.

The square root of 2212721243 is about 47039.5710333332. The cubic root of 2212721243 is about 1303.0934698481.

Adding to 2212721243 its reverse (3421272122), we get a palindrome (5633993365).

The spelling of 2212721243 in words is "two billion, two hundred twelve million, seven hundred twenty-one thousand, two hundred forty-three".