2311224221 has 2 divisors, whose sum is σ = 2311224222. Its totient is φ = 2311224220.

The previous prime is 2311224199. The next prime is 2311224229. The reversal of 2311224221 is 1224221132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2067520900 + 243703321 = 45470^2 + 15611^2 .

It is a cyclic number.

It is not a de Polignac number, because 2311224221 - 2¹⁴ = 2311207837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2311224193 and 2311224202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2311224229) 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, 1155612110 + 1155612111.

It is an arithmetic number, because the mean of its divisors is an integer number (1155612111).

Almost surely, 2^2311224221 is an apocalyptic number.

It is an amenable number.

2311224221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2311224221 is an equidigital number, since it uses as much as digits as its factorization.

2311224221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 20.

The square root of 2311224221 is about 48075.1934057472. The cubic root of 2311224221 is about 1322.1498905393.

Adding to 2311224221 its reverse (1224221132), we get a palindrome (3535445353).

The spelling of 2311224221 in words is "two billion, three hundred eleven million, two hundred twenty-four thousand, two hundred twenty-one".