20321122303081 has 2 divisors, whose sum is σ = 20321122303082. Its totient is φ = 20321122303080.

The previous prime is 20321122303061. The next prime is 20321122303117. The reversal of 20321122303081 is 18030322112302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16741681555600 + 3579440747481 = 4091660^2 + 1891941^2 .

It is a cyclic number.

It is not a de Polignac number, because 20321122303081 - 2²¹ = 20321120205929 is a prime.

It is a super-2 number, since 2×20321122303081² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20321122303051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160561151540 + 10160561151541.

It is an arithmetic number, because the mean of its divisors is an integer number (10160561151541).

Almost surely, 2^{20321122303081} is an apocalyptic number.

It is an amenable number.

20321122303081 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321122303081 is an equidigital number, since it uses as much as digits as its factorization.

20321122303081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 20321122303081 its reverse (18030322112302), we get a palindrome (38351444415383).

The spelling of 20321122303081 in words is "twenty trillion, three hundred twenty-one billion, one hundred twenty-two million, three hundred three thousand, eighty-one".