1231331027 has 2 divisors, whose sum is σ = 1231331028. Its totient is φ = 1231331026.

The previous prime is 1231330999. The next prime is 1231331053. The reversal of 1231331027 is 7201331321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1231331027 - 2²⁰ = 1230282451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231330993 and 1231331011.

It is not a weakly prime, because it can be changed into another prime (1231331527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615665513 + 615665514.

It is an arithmetic number, because the mean of its divisors is an integer number (615665514).

Almost surely, 2^1231331027 is an apocalyptic number.

1231331027 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231331027 is an equidigital number, since it uses as much as digits as its factorization.

1231331027 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 1231331027 is about 35090.3266869945. The cubic root of 1231331027 is about 1071.8276120080.

Adding to 1231331027 its reverse (7201331321), we get a palindrome (8432662348).

The spelling of 1231331027 in words is "one billion, two hundred thirty-one million, three hundred thirty-one thousand, twenty-seven".