212124100123 has 4 divisors (see below), whose sum is σ = 228441338608. Its totient is φ = 195806861640.

The previous prime is 212124100091. The next prime is 212124100127. The reversal of 212124100123 is 321001421212.

212124100123 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 212124100123 - 2⁵ = 212124100091 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 212124100123.

It is not an unprimeable number, because it can be changed into a prime (212124100127) 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, 8158619223 + ... + 8158619248.

It is an arithmetic number, because the mean of its divisors is an integer number (57110334652).

Almost surely, 2^212124100123 is an apocalyptic number.

212124100123 is a deficient number, since it is larger than the sum of its proper divisors (16317238485).

212124100123 is a wasteful number, since it uses less digits than its factorization.

212124100123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16317238484.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 212124100123 its reverse (321001421212), we get a palindrome (533125521335).

The spelling of 212124100123 in words is "two hundred twelve billion, one hundred twenty-four million, one hundred thousand, one hundred twenty-three".