212100001022123 has 2 divisors, whose sum is σ = 212100001022124. Its totient is φ = 212100001022122.

The previous prime is 212100001022017. The next prime is 212100001022153. The reversal of 212100001022123 is 321220100001212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212100001022123 - 2¹⁸ = 212100000759979 is a prime.

It is not a weakly prime, because it can be changed into another prime (212100001022153) 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, 106050000511061 + 106050000511062.

It is an arithmetic number, because the mean of its divisors is an integer number (106050000511062).

Almost surely, 2^{212100001022123} is an apocalyptic number.

212100001022123 is a deficient number, since it is larger than the sum of its proper divisors (1).

212100001022123 is an equidigital number, since it uses as much as digits as its factorization.

212100001022123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 212100001022123 its reverse (321220100001212), we get a palindrome (533320101023335).

The spelling of 212100001022123 in words is "two hundred twelve trillion, one hundred billion, one million, twenty-two thousand, one hundred twenty-three".