1321340019999 has 8 divisors (see below), whose sum is σ = 1762233070080. Its totient is φ = 880670158296.

The previous prime is 1321340019997. The next prime is 1321340020037. The reversal of 1321340019999 is 9999100431231.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1321340019999 - 2¹ = 1321340019997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321340019997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55783279 + ... + 55806960.

It is an arithmetic number, because the mean of its divisors is an integer number (220279133760).

Almost surely, 2^{1321340019999} is an apocalyptic number.

1321340019999 is a deficient number, since it is larger than the sum of its proper divisors (440893050081).

1321340019999 is a wasteful number, since it uses less digits than its factorization.

1321340019999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111594189.

The product of its (nonzero) digits is 472392, while the sum is 51.

The spelling of 1321340019999 in words is "one trillion, three hundred twenty-one billion, three hundred forty million, nineteen thousand, nine hundred ninety-nine".