20321132123 has 2 divisors, whose sum is σ = 20321132124. Its totient is φ = 20321132122.

The previous prime is 20321132107. The next prime is 20321132147. The reversal of 20321132123 is 32123112302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20321132123 - 2⁴ = 20321132107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20321132095 and 20321132104.

It is not a weakly prime, because it can be changed into another prime (20321132173) 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, 10160566061 + 10160566062.

It is an arithmetic number, because the mean of its divisors is an integer number (10160566062).

Almost surely, 2^20321132123 is an apocalyptic number.

20321132123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321132123 is an equidigital number, since it uses as much as digits as its factorization.

20321132123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20321132123 its reverse (32123112302), we get a palindrome (52444244425).

The spelling of 20321132123 in words is "twenty billion, three hundred twenty-one million, one hundred thirty-two thousand, one hundred twenty-three".