1321257401185 has 8 divisors (see below), whose sum is σ = 1585551378816. Its totient is φ = 1056977589360.

The previous prime is 1321257401083. The next prime is 1321257401207. The reversal of 1321257401185 is 5811047521231.

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

It is not a de Polignac number, because 1321257401185 - 2³¹ = 1319109917537 is a prime.

It is a super-2 number, since 2×1321257401185² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3335161 + ... + 3710230.

It is an arithmetic number, because the mean of its divisors is an integer number (198193922352).

Almost surely, 2^{1321257401185} is an apocalyptic number.

It is an amenable number.

1321257401185 is a deficient number, since it is larger than the sum of its proper divisors (264293977631).

1321257401185 is an equidigital number, since it uses as much as digits as its factorization.

1321257401185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7082903.

The product of its (nonzero) digits is 67200, while the sum is 40.

The spelling of 1321257401185 in words is "one trillion, three hundred twenty-one billion, two hundred fifty-seven million, four hundred one thousand, one hundred eighty-five".