20332332221 has 2 divisors, whose sum is σ = 20332332222. Its totient is φ = 20332332220.

The previous prime is 20332332203. The next prime is 20332332247. The reversal of 20332332221 is 12223323302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15994660900 + 4337671321 = 126470^2 + 65861^2 .

It is a cyclic number.

It is not a de Polignac number, because 20332332221 - 2⁶ = 20332332157 is a prime.

It is a super-2 number, since 2×20332332221² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20332332121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10166166110 + 10166166111.

It is an arithmetic number, because the mean of its divisors is an integer number (10166166111).

Almost surely, 2^20332332221 is an apocalyptic number.

It is an amenable number.

20332332221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20332332221 is an equidigital number, since it uses as much as digits as its factorization.

20332332221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 20332332221 its reverse (12223323302), we get a palindrome (32555655523).

The spelling of 20332332221 in words is "twenty billion, three hundred thirty-two million, three hundred thirty-two thousand, two hundred twenty-one".