20268822121 has 2 divisors, whose sum is σ = 20268822122. Its totient is φ = 20268822120.

The previous prime is 20268822083. The next prime is 20268822139. The reversal of 20268822121 is 12122886202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19786360896 + 482461225 = 140664^2 + 21965^2 .

It is a cyclic number.

It is not a de Polignac number, because 20268822121 - 2⁹ = 20268821609 is a prime.

It is not a weakly prime, because it can be changed into another prime (20268826121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10134411060 + 10134411061.

It is an arithmetic number, because the mean of its divisors is an integer number (10134411061).

Almost surely, 2^20268822121 is an apocalyptic number.

It is an amenable number.

20268822121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20268822121 is an equidigital number, since it uses as much as digits as its factorization.

20268822121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 34.

The spelling of 20268822121 in words is "twenty billion, two hundred sixty-eight million, eight hundred twenty-two thousand, one hundred twenty-one".