1210221247 has 2 divisors, whose sum is σ = 1210221248. Its totient is φ = 1210221246.

The previous prime is 1210221241. The next prime is 1210221251. The reversal of 1210221247 is 7421220121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1210221247 - 2⁷ = 1210221119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210221241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605110623 + 605110624.

It is an arithmetic number, because the mean of its divisors is an integer number (605110624).

Almost surely, 2^1210221247 is an apocalyptic number.

1210221247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210221247 is an equidigital number, since it uses as much as digits as its factorization.

1210221247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 1210221247 is about 34788.2343185164. The cubic root of 1210221247 is about 1065.6671808245.

Adding to 1210221247 its reverse (7421220121), we get a palindrome (8631441368).

The spelling of 1210221247 in words is "one billion, two hundred ten million, two hundred twenty-one thousand, two hundred forty-seven".