20012120123123 has 2 divisors, whose sum is σ = 20012120123124. Its totient is φ = 20012120123122.

The previous prime is 20012120123113. The next prime is 20012120123137. The reversal of 20012120123123 is 32132102121002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20012120123123 - 2¹⁴ = 20012120106739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20012120123095 and 20012120123104.

It is not a weakly prime, because it can be changed into another prime (20012120123113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006060061561 + 10006060061562.

It is an arithmetic number, because the mean of its divisors is an integer number (10006060061562).

Almost surely, 2^{20012120123123} is an apocalyptic number.

20012120123123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012120123123 is an equidigital number, since it uses as much as digits as its factorization.

20012120123123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 20012120123123 its reverse (32132102121002), we get a palindrome (52144222244125).

The spelling of 20012120123123 in words is "twenty trillion, twelve billion, one hundred twenty million, one hundred twenty-three thousand, one hundred twenty-three".