4421221249 has 2 divisors, whose sum is σ = 4421221250. Its totient is φ = 4421221248.

The previous prime is 4421221243. The next prime is 4421221307. The reversal of 4421221249 is 9421221244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3225444849 + 1195776400 = 56793^2 + 34580^2 .

It is a cyclic number.

It is not a de Polignac number, because 4421221249 - 2⁷ = 4421221121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4421221249.

It is not a weakly prime, because it can be changed into another prime (4421221243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2210610624 + 2210610625.

It is an arithmetic number, because the mean of its divisors is an integer number (2210610625).

Almost surely, 2^4421221249 is an apocalyptic number.

It is an amenable number.

4421221249 is a deficient number, since it is larger than the sum of its proper divisors (1).

4421221249 is an equidigital number, since it uses as much as digits as its factorization.

4421221249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 31.

The square root of 4421221249 is about 66492.2645801750. The cubic root of 4421221249 is about 1641.2727143458.

The spelling of 4421221249 in words is "four billion, four hundred twenty-one million, two hundred twenty-one thousand, two hundred forty-nine".