1111424221 has 2 divisors, whose sum is σ = 1111424222. Its totient is φ = 1111424220.

The previous prime is 1111424201. The next prime is 1111424231. The reversal of 1111424221 is 1224241111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 605848996 + 505575225 = 24614^2 + 22485^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111424221 - 2¹³ = 1111416029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111424201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555712110 + 555712111.

It is an arithmetic number, because the mean of its divisors is an integer number (555712111).

Almost surely, 2^1111424221 is an apocalyptic number.

It is an amenable number.

1111424221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111424221 is an equidigital number, since it uses as much as digits as its factorization.

1111424221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 128, while the sum is 19.

The square root of 1111424221 is about 33338.0296508357. The cubic root of 1111424221 is about 1035.8414500364.

Adding to 1111424221 its reverse (1224241111), we get a palindrome (2335665332).

The spelling of 1111424221 in words is "one billion, one hundred eleven million, four hundred twenty-four thousand, two hundred twenty-one".