1321304251305 has 16 divisors (see below), whose sum is σ = 2118392489664. Its totient is φ = 703260371520.

The previous prime is 1321304251271. The next prime is 1321304251339. The reversal of 1321304251305 is 5031524031231.

It is an interprime number because it is at equal distance from previous prime (1321304251271) and next prime (1321304251339).

It is not a de Polignac number, because 1321304251305 - 2²¹ = 1321302154153 is a prime.

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, 89694214 + ... + 89708943.

It is an arithmetic number, because the mean of its divisors is an integer number (132399530604).

Almost surely, 2^{1321304251305} is an apocalyptic number.

1321304251305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1321304251305 is a deficient number, since it is larger than the sum of its proper divisors (797088238359).

1321304251305 is a wasteful number, since it uses less digits than its factorization.

1321304251305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179403656.

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 1321304251305 its reverse (5031524031231), we get a palindrome (6352828282536).

The spelling of 1321304251305 in words is "one trillion, three hundred twenty-one billion, three hundred four million, two hundred fifty-one thousand, three hundred five".