1321320402115 has 16 divisors (see below), whose sum is σ = 1850651799552. Its totient is φ = 886770651744.

The previous prime is 1321320402109. The next prime is 1321320402133. The reversal of 1321320402115 is 5112040231231.

It is a cyclic number.

It is not a de Polignac number, because 1321320402115 - 2³ = 1321320402107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1321320402115.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 401615499 + ... + 401618788.

It is an arithmetic number, because the mean of its divisors is an integer number (115665737472).

Almost surely, 2^{1321320402115} is an apocalyptic number.

1321320402115 is a deficient number, since it is larger than the sum of its proper divisors (529331397437).

1321320402115 is an equidigital number, since it uses as much as digits as its factorization.

1321320402115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803234346.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 1321320402115 its reverse (5112040231231), we get a palindrome (6433360633346).

The spelling of 1321320402115 in words is "one trillion, three hundred twenty-one billion, three hundred twenty million, four hundred two thousand, one hundred fifteen".