1304400001321 has 4 divisors (see below), whose sum is σ = 1304410697172. Its totient is φ = 1304389305472.

The previous prime is 1304400001279. The next prime is 1304400001327. The reversal of 1304400001321 is 1231000044031.

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

It can be written as a sum of positive squares in 2 ways, for example, as 553482433296 + 750917568025 = 743964^2 + 866555^2 .

It is a cyclic number.

It is not a de Polignac number, because 1304400001321 - 2⁷ = 1304400001193 is a prime.

It is a super-3 number, since 3×1304400001321³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1304400001327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5162860 + ... + 5409613.

It is an arithmetic number, because the mean of its divisors is an integer number (326102674293).

Almost surely, 2^{1304400001321} is an apocalyptic number.

It is an amenable number.

1304400001321 is a deficient number, since it is larger than the sum of its proper divisors (10695851).

1304400001321 is a wasteful number, since it uses less digits than its factorization.

1304400001321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10695850.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 1304400001321 its reverse (1231000044031), we get a palindrome (2535400045352).

The spelling of 1304400001321 in words is "one trillion, three hundred four billion, four hundred million, one thousand, three hundred twenty-one".