1321003365419 has 4 divisors (see below), whose sum is σ = 1321367181600. Its totient is φ = 1320639549240.

The previous prime is 1321003365349. The next prime is 1321003365421. The reversal of 1321003365419 is 9145633001231.

It is a happy number.

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 1321003365419 - 2¹² = 1321003361323 is a prime.

It is a super-2 number, since 2×1321003365419² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321003365719) 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 in 3 ways as a sum of consecutive naturals, for example, 181902644 + ... + 181909905.

It is an arithmetic number, because the mean of its divisors is an integer number (330341795400).

Almost surely, 2^{1321003365419} is an apocalyptic number.

1321003365419 is a deficient number, since it is larger than the sum of its proper divisors (363816181).

1321003365419 is an equidigital number, since it uses as much as digits as its factorization.

1321003365419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363816180.

The product of its (nonzero) digits is 58320, while the sum is 38.

The spelling of 1321003365419 in words is "one trillion, three hundred twenty-one billion, three million, three hundred sixty-five thousand, four hundred nineteen".