1320231331205 has 8 divisors (see below), whose sum is σ = 1584321059832. Its totient is φ = 1056156090048.

The previous prime is 1320231331169. The next prime is 1320231331213. The reversal of 1320231331205 is 5021331320231.

It can be written as a sum of positive squares in 4 ways, for example, as 303751992769 + 1016479338436 = 551137^2 + 1008206^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1320231331205 - 2⁶ = 1320231331141 is a prime.

It is a Duffinian number.

It is a congruent 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, 3420362 + ... + 3786731.

It is an arithmetic number, because the mean of its divisors is an integer number (198040132479).

Almost surely, 2^{1320231331205} is an apocalyptic number.

It is an amenable number.

1320231331205 is a deficient number, since it is larger than the sum of its proper divisors (264089728627).

1320231331205 is an equidigital number, since it uses as much as digits as its factorization.

1320231331205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7243735.

The product of its (nonzero) digits is 3240, while the sum is 26.

Adding to 1320231331205 its reverse (5021331320231), we get a palindrome (6341562651436).

The spelling of 1320231331205 in words is "one trillion, three hundred twenty billion, two hundred thirty-one million, three hundred thirty-one thousand, two hundred five".