20123230443101 has 2 divisors, whose sum is σ = 20123230443102. Its totient is φ = 20123230443100.

The previous prime is 20123230443067. The next prime is 20123230443103. The reversal of 20123230443101 is 10134403232102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20099315367076 + 23915076025 = 4483226^2 + 154645^2 .

It is a cyclic number.

It is not a de Polignac number, because 20123230443101 - 2¹⁸ = 20123230180957 is a prime.

It is a super-2 number, since 2×20123230443101² (a number of 27 digits) contains 22 as substring.

Together with 20123230443103, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20123230443103) 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, 10061615221550 + 10061615221551.

It is an arithmetic number, because the mean of its divisors is an integer number (10061615221551).

Almost surely, 2^{20123230443101} is an apocalyptic number.

It is an amenable number.

20123230443101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123230443101 is an equidigital number, since it uses as much as digits as its factorization.

20123230443101 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 26.

Adding to 20123230443101 its reverse (10134403232102), we get a palindrome (30257633675203).

The spelling of 20123230443101 in words is "twenty trillion, one hundred twenty-three billion, two hundred thirty million, four hundred forty-three thousand, one hundred one".