20041322221 has 2 divisors, whose sum is σ = 20041322222. Its totient is φ = 20041322220.

The previous prime is 20041322183. The next prime is 20041322237. The reversal of 20041322221 is 12222314002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16093713321 + 3947608900 = 126861^2 + 62830^2 .

It is a cyclic number.

It is not a de Polignac number, because 20041322221 - 2²⁷ = 19907104493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20041322621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10020661110 + 10020661111.

It is an arithmetic number, because the mean of its divisors is an integer number (10020661111).

Almost surely, 2^20041322221 is an apocalyptic number.

It is an amenable number.

20041322221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20041322221 is an equidigital number, since it uses as much as digits as its factorization.

20041322221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20041322221 its reverse (12222314002), we get a palindrome (32263636223).

The spelling of 20041322221 in words is "twenty billion, forty-one million, three hundred twenty-two thousand, two hundred twenty-one".