1331321027 has 2 divisors, whose sum is σ = 1331321028. Its totient is φ = 1331321026.

The previous prime is 1331321003. The next prime is 1331321053. The reversal of 1331321027 is 7201231331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1331321027 - 2¹⁴ = 1331304643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1331320993 and 1331321011.

It is not a weakly prime, because it can be changed into another prime (1331327027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665660513 + 665660514.

It is an arithmetic number, because the mean of its divisors is an integer number (665660514).

Almost surely, 2^1331321027 is an apocalyptic number.

1331321027 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331321027 is an equidigital number, since it uses as much as digits as its factorization.

1331321027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 1331321027 is about 36487.2721233035. The cubic root of 1331321027 is about 1100.0884300809.

Adding to 1331321027 its reverse (7201231331), we get a palindrome (8532552358).

The spelling of 1331321027 in words is "one billion, three hundred thirty-one million, three hundred twenty-one thousand, twenty-seven".