1331321431225 has 6 divisors (see below), whose sum is σ = 1650838574750. Its totient is φ = 1065057144960.

The previous prime is 1331321431213. The next prime is 1331321431283. The reversal of 1331321431225 is 5221341231331.

It can be written as a sum of positive squares in 3 ways, for example, as 2272142889 + 1329049288336 = 47667^2 + 1152844^2 .

It is not a de Polignac number, because 1331321431225 - 2³⁹ = 781565617337 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26626428600 + ... + 26626428649.

Almost surely, 2^{1331321431225} is an apocalyptic number.

It is an amenable number.

1331321431225 is a deficient number, since it is larger than the sum of its proper divisors (319517143525).

1331321431225 is an equidigital number, since it uses as much as digits as its factorization.

1331321431225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53252857259 (or 53252857254 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

Adding to 1331321431225 its reverse (5221341231331), we get a palindrome (6552662662556).

The spelling of 1331321431225 in words is "one trillion, three hundred thirty-one billion, three hundred twenty-one million, four hundred thirty-one thousand, two hundred twenty-five".