20100013123 has 2 divisors, whose sum is σ = 20100013124. Its totient is φ = 20100013122.

The previous prime is 20100013111. The next prime is 20100013127. The reversal of 20100013123 is 32131000102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20100013123 is a prime.

It is not a weakly prime, because it can be changed into another prime (20100013127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050006561 + 10050006562.

It is an arithmetic number, because the mean of its divisors is an integer number (10050006562).

Almost surely, 2^20100013123 is an apocalyptic number.

20100013123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20100013123 is an equidigital number, since it uses as much as digits as its factorization.

20100013123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 20100013123 its reverse (32131000102), we get a palindrome (52231013225).

The spelling of 20100013123 in words is "twenty billion, one hundred million, thirteen thousand, one hundred twenty-three".