1231332001 has 2 divisors, whose sum is σ = 1231332002. Its totient is φ = 1231332000.

The previous prime is 1231331989. The next prime is 1231332007. The reversal of 1231332001 is 1002331321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1079451025 + 151880976 = 32855^2 + 12324^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231332001 - 2⁹ = 1231331489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231332007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615666000 + 615666001.

It is an arithmetic number, because the mean of its divisors is an integer number (615666001).

Almost surely, 2^1231332001 is an apocalyptic number.

It is an amenable number.

1231332001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231332001 is an equidigital number, since it uses as much as digits as its factorization.

1231332001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1231332001 is about 35090.3405654605. The cubic root of 1231332001 is about 1071.8278946181.

Adding to 1231332001 its reverse (1002331321), we get a palindrome (2233663322).

The spelling of 1231332001 in words is "one billion, two hundred thirty-one million, three hundred thirty-two thousand, one".