20321201 has 2 divisors, whose sum is σ = 20321202. Its totient is φ = 20321200.

The previous prime is 20321183. The next prime is 20321233. The reversal of 20321201 is 10212302.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17631601 + 2689600 = 4199^2 + 1640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20321201 is a prime.

It is not a weakly prime, because it can be changed into another prime (20321261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160600 + 10160601.

It is an arithmetic number, because the mean of its divisors is an integer number (10160601).

Almost surely, 2^20321201 is an apocalyptic number.

It is an amenable number.

20321201 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321201 is an equidigital number, since it uses as much as digits as its factorization.

20321201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 20321201 is about 4507.9042802615. The cubic root of 20321201 is about 272.8871740119.

Adding to 20321201 its reverse (10212302), we get a palindrome (30533503).

The spelling of 20321201 in words is "twenty million, three hundred twenty-one thousand, two hundred one".