20010104123 has 2 divisors, whose sum is σ = 20010104124. Its totient is φ = 20010104122.

The previous prime is 20010104077. The next prime is 20010104173. The reversal of 20010104123 is 32140101002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20010104123 - 2¹⁴ = 20010087739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20010104098 and 20010104107.

It is not a weakly prime, because it can be changed into another prime (20010104173) 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, 10005052061 + 10005052062.

It is an arithmetic number, because the mean of its divisors is an integer number (10005052062).

Almost surely, 2^20010104123 is an apocalyptic number.

20010104123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010104123 is an equidigital number, since it uses as much as digits as its factorization.

20010104123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20010104123 its reverse (32140101002), we get a palindrome (52150205125).

The spelling of 20010104123 in words is "twenty billion, ten million, one hundred four thousand, one hundred twenty-three".