1119966821 has 2 divisors, whose sum is σ = 1119966822. Its totient is φ = 1119966820.

The previous prime is 1119966787. The next prime is 1119966889. The reversal of 1119966821 is 1286699111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1109822596 + 10144225 = 33314^2 + 3185^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1119966821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1119966521) 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, 559983410 + 559983411.

It is an arithmetic number, because the mean of its divisors is an integer number (559983411).

Almost surely, 2^1119966821 is an apocalyptic number.

It is an amenable number.

1119966821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1119966821 is an equidigital number, since it uses as much as digits as its factorization.

1119966821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 44.

The square root of 1119966821 is about 33465.9053515664. The cubic root of 1119966821 is about 1038.4885654022.

The spelling of 1119966821 in words is "one billion, one hundred nineteen million, nine hundred sixty-six thousand, eight hundred twenty-one".