2321521001 has 2 divisors, whose sum is σ = 2321521002. Its totient is φ = 2321521000.

The previous prime is 2321520977. The next prime is 2321521019. The reversal of 2321521001 is 1001251232.

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., 1940490601 + 381030400 = 44051^2 + 19520^2 .

It is a cyclic number.

It is not a de Polignac number, because 2321521001 - 2³⁰ = 1247779177 is a prime.

It is not a weakly prime, because it can be changed into another prime (2321521051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1160760500 + 1160760501.

It is an arithmetic number, because the mean of its divisors is an integer number (1160760501).

Almost surely, 2^2321521001 is an apocalyptic number.

It is an amenable number.

2321521001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2321521001 is an equidigital number, since it uses as much as digits as its factorization.

2321521001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 2321521001 is about 48182.1647604173. The cubic root of 2321521001 is about 1324.1104271752.

Adding to 2321521001 its reverse (1001251232), we get a palindrome (3322772233).

The spelling of 2321521001 in words is "two billion, three hundred twenty-one million, five hundred twenty-one thousand, one".