1321341019 has 4 divisors (see below), whose sum is σ = 1321611696. Its totient is φ = 1321070344.

The previous prime is 1321341017. The next prime is 1321341041. The reversal of 1321341019 is 9101431231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1321341019 - 2¹ = 1321341017 is a prime.

It is a super-2 number, since 2×1321341019² = 3491884176983916722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321340984 and 1321341002.

It is not an unprimeable number, because it can be changed into a prime (1321341013) 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 in 3 ways as a sum of consecutive naturals, for example, 127879 + ... + 137824.

It is an arithmetic number, because the mean of its divisors is an integer number (330402924).

Almost surely, 2^1321341019 is an apocalyptic number.

1321341019 is a deficient number, since it is larger than the sum of its proper divisors (270677).

1321341019 is an equidigital number, since it uses as much as digits as its factorization.

1321341019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270676.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1321341019 is about 36350.2547308819. The cubic root of 1321341019 is about 1097.3326610128.

The spelling of 1321341019 in words is "one billion, three hundred twenty-one million, three hundred forty-one thousand, nineteen".