1119666221 has 2 divisors, whose sum is σ = 1119666222. Its totient is φ = 1119666220.

The previous prime is 1119666211. The next prime is 1119666239. The reversal of 1119666221 is 1226669111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1104565225 + 15100996 = 33235^2 + 3886^2 .

It is a cyclic number.

It is not a de Polignac number, because 1119666221 - 2²⁶ = 1052557357 is a prime.

It is a super-4 number, since 4×1119666221⁴ (a number of 37 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1119666211) 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, 559833110 + 559833111.

It is an arithmetic number, because the mean of its divisors is an integer number (559833111).

Almost surely, 2^1119666221 is an apocalyptic number.

It is an amenable number.

1119666221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1119666221 is an equidigital number, since it uses as much as digits as its factorization.

1119666221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 35.

The square root of 1119666221 is about 33461.4139121466. The cubic root of 1119666221 is about 1038.3956466984.

The spelling of 1119666221 in words is "one billion, one hundred nineteen million, six hundred sixty-six thousand, two hundred twenty-one".