1321304010985 has 16 divisors (see below), whose sum is σ = 1836897008256. Its totient is φ = 893625568128.

The previous prime is 1321304010941. The next prime is 1321304011121. The reversal of 1321304010985 is 5890104031231.

It is a cyclic number.

It is not a de Polignac number, because 1321304010985 - 2¹⁹ = 1321303486697 is a prime.

It is a Duffinian number.

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, 258569659 + ... + 258574768.

It is an arithmetic number, because the mean of its divisors is an integer number (114806063016).

Almost surely, 2^{1321304010985} is an apocalyptic number.

It is an amenable number.

1321304010985 is a deficient number, since it is larger than the sum of its proper divisors (515592997271).

1321304010985 is an equidigital number, since it uses as much as digits as its factorization.

1321304010985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517144512.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 1321304010985 in words is "one trillion, three hundred twenty-one billion, three hundred four million, ten thousand, nine hundred eighty-five".