20010122121103 has 2 divisors, whose sum is σ = 20010122121104. Its totient is φ = 20010122121102.

The previous prime is 20010122121061. The next prime is 20010122121113. The reversal of 20010122121103 is 30112122101002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20010122121103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20010122121113) 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, 10005061060551 + 10005061060552.

It is an arithmetic number, because the mean of its divisors is an integer number (10005061060552).

Almost surely, 2^{20010122121103} is an apocalyptic number.

20010122121103 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010122121103 is an equidigital number, since it uses as much as digits as its factorization.

20010122121103 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 16.

Adding to 20010122121103 its reverse (30112122101002), we get a palindrome (50122244222105).

The spelling of 20010122121103 in words is "twenty trillion, ten billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred three".