20201012123 has 2 divisors, whose sum is σ = 20201012124. Its totient is φ = 20201012122.

The previous prime is 20201012101. The next prime is 20201012141. The reversal of 20201012123 is 32121010202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20201012123 - 2³² = 15906044827 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20201012098 and 20201012107.

It is not a weakly prime, because it can be changed into another prime (20201015123) 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, 10100506061 + 10100506062.

It is an arithmetic number, because the mean of its divisors is an integer number (10100506062).

Almost surely, 2^20201012123 is an apocalyptic number.

20201012123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201012123 is an equidigital number, since it uses as much as digits as its factorization.

20201012123 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 20201012123 its reverse (32121010202), we get a palindrome (52322022325).

The spelling of 20201012123 in words is "twenty billion, two hundred one million, twelve thousand, one hundred twenty-three".