212122113123 has 4 divisors (see below), whose sum is σ = 282829484168. Its totient is φ = 141414742080.

The previous prime is 212122113097. The next prime is 212122113131. The reversal of 212122113123 is 321311221212.

212122113123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 212122113123 - 2⁶ = 212122113059 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212122113123.

It is not an unprimeable number, because it can be changed into a prime (212122113023) 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 in 3 ways as a sum of consecutive naturals, for example, 35353685518 + ... + 35353685523.

It is an arithmetic number, because the mean of its divisors is an integer number (70707371042).

Almost surely, 2^212122113123 is an apocalyptic number.

212122113123 is a deficient number, since it is larger than the sum of its proper divisors (70707371045).

212122113123 is an equidigital number, since it uses as much as digits as its factorization.

212122113123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70707371044.

The product of its digits is 288, while the sum is 21.

Adding to 212122113123 its reverse (321311221212), we get a palindrome (533433334335).

The spelling of 212122113123 in words is "two hundred twelve billion, one hundred twenty-two million, one hundred thirteen thousand, one hundred twenty-three".