1321124219 has 2 divisors, whose sum is σ = 1321124220. Its totient is φ = 1321124218.

The previous prime is 1321124171. The next prime is 1321124221. The reversal of 1321124219 is 9124211231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1321124219 - 2²⁴ = 1304347003 is a prime.

It is a super-2 number, since 2×1321124219² = 3490738404056719922, which contains 22 as substring.

Together with 1321124221, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1321124239) 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, 660562109 + 660562110.

It is an arithmetic number, because the mean of its divisors is an integer number (660562110).

Almost surely, 2^1321124219 is an apocalyptic number.

1321124219 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321124219 is an equidigital number, since it uses as much as digits as its factorization.

1321124219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 26.

The square root of 1321124219 is about 36347.2725111527. The cubic root of 1321124219 is about 1097.2726425088.

The spelling of 1321124219 in words is "one billion, three hundred twenty-one million, one hundred twenty-four thousand, two hundred nineteen".