321232001 has 2 divisors, whose sum is σ = 321232002. Its totient is φ = 321232000.

The previous prime is 321231997. The next prime is 321232003. The reversal of 321232001 is 100232123.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 240250000 + 80982001 = 15500^2 + 8999^2 .

It is a cyclic number.

It is not a de Polignac number, because 321232001 - 2² = 321231997 is a prime.

It is a Sophie Germain prime.

Together with 321232003, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (321232003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160616000 + 160616001.

It is an arithmetic number, because the mean of its divisors is an integer number (160616001).

Almost surely, 2^321232001 is an apocalyptic number.

It is an amenable number.

321232001 is a deficient number, since it is larger than the sum of its proper divisors (1).

321232001 is an equidigital number, since it uses as much as digits as its factorization.

321232001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 321232001 is about 17922.9462142807. The cubic root of 321232001 is about 684.8670429431.

Adding to 321232001 its reverse (100232123), we get a palindrome (421464124).

The spelling of 321232001 in words is "three hundred twenty-one million, two hundred thirty-two thousand, one".