1321054199 has 2 divisors, whose sum is σ = 1321054200. Its totient is φ = 1321054198.

The previous prime is 1321054183. The next prime is 1321054261. The reversal of 1321054199 is 9914501231.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321054199 - 2⁴ = 1321054183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321054129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660527099 + 660527100.

It is an arithmetic number, because the mean of its divisors is an integer number (660527100).

Almost surely, 2^1321054199 is an apocalyptic number.

1321054199 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321054199 is an equidigital number, since it uses as much as digits as its factorization.

1321054199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 1321054199 is about 36346.3092899403. The cubic root of 1321054199 is about 1097.2532569011.

The spelling of 1321054199 in words is "one billion, three hundred twenty-one million, fifty-four thousand, one hundred ninety-nine".