2021112110123 has 2 divisors, whose sum is σ = 2021112110124. Its totient is φ = 2021112110122.

The previous prime is 2021112110111. The next prime is 2021112110167. The reversal of 2021112110123 is 3210112111202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021112110123 - 2⁴ = 2021112110107 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021112010123) 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, 1010556055061 + 1010556055062.

It is an arithmetic number, because the mean of its divisors is an integer number (1010556055062).

Almost surely, 2^{2021112110123} is an apocalyptic number.

2021112110123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021112110123 is an equidigital number, since it uses as much as digits as its factorization.

2021112110123 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 17.

Adding to 2021112110123 its reverse (3210112111202), we get a palindrome (5231224221325).

The spelling of 2021112110123 in words is "two trillion, twenty-one billion, one hundred twelve million, one hundred ten thousand, one hundred twenty-three".