1321426219 has 2 divisors, whose sum is σ = 1321426220. Its totient is φ = 1321426218.

The previous prime is 1321426207. The next prime is 1321426241. The reversal of 1321426219 is 9126241231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321426219 - 2¹¹ = 1321424171 is a prime.

It is a super-2 number, since 2×1321426219² = 3492334504521271922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1321426279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660713109 + 660713110.

It is an arithmetic number, because the mean of its divisors is an integer number (660713110).

Almost surely, 2^1321426219 is an apocalyptic number.

1321426219 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321426219 is an equidigital number, since it uses as much as digits as its factorization.

1321426219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 1321426219 is about 36351.4266432557. The cubic root of 1321426219 is about 1097.3562458234.

The spelling of 1321426219 in words is "one billion, three hundred twenty-one million, four hundred twenty-six thousand, two hundred nineteen".