1231213327 has 2 divisors, whose sum is σ = 1231213328. Its totient is φ = 1231213326.

The previous prime is 1231213303. The next prime is 1231213339. The reversal of 1231213327 is 7233121321.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1231213327 - 2¹⁹ = 1230689039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231213387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615606663 + 615606664.

It is an arithmetic number, because the mean of its divisors is an integer number (615606664).

Almost surely, 2^1231213327 is an apocalyptic number.

1231213327 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231213327 is an equidigital number, since it uses as much as digits as its factorization.

1231213327 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 25.

The square root of 1231213327 is about 35088.6495465414. The cubic root of 1231213327 is about 1071.7934597703.

Adding to 1231213327 its reverse (7233121321), we get a palindrome (8464334648).

The spelling of 1231213327 in words is "one billion, two hundred thirty-one million, two hundred thirteen thousand, three hundred twenty-seven".