1231817932801 has 6 divisors (see below), whose sum is σ = 1300062694002. Its totient is φ = 1166985409680.

The previous prime is 1231817932781. The next prime is 1231817932841. The reversal of 1231817932801 is 1082397181321.

It can be written as a sum of positive squares in only one way, i.e., 1231001345025 + 816587776 = 1109505^2 + 28576^2 .

It is not a de Polignac number, because 1231817932801 - 2¹¹ = 1231817930753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231817932841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1706118660 + ... + 1706119381.

It is an arithmetic number, because the mean of its divisors is an integer number (216677115667).

Almost surely, 2^{1231817932801} is an apocalyptic number.

It is an amenable number.

1231817932801 is a deficient number, since it is larger than the sum of its proper divisors (68244761201).

1231817932801 is an equidigital number, since it uses as much as digits as its factorization.

1231817932801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3412238079 (or 3412238060 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 1231817932801 in words is "one trillion, two hundred thirty-one billion, eight hundred seventeen million, nine hundred thirty-two thousand, eight hundred one".