212123012323 has 4 divisors (see below), whose sum is σ = 212128684200. Its totient is φ = 212117340448.

The previous prime is 212123012281. The next prime is 212123012333. The reversal of 212123012323 is 323210321212.

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

It is a cyclic number.

It is not a de Polignac number, because 212123012323 - 2²⁵ = 212089457891 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212123012294 and 212123012303.

It is not an unprimeable number, because it can be changed into a prime (212123012333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2779465 + ... + 2854762.

It is an arithmetic number, because the mean of its divisors is an integer number (53032171050).

Almost surely, 2^212123012323 is an apocalyptic number.

212123012323 is a deficient number, since it is larger than the sum of its proper divisors (5671877).

212123012323 is an equidigital number, since it uses as much as digits as its factorization.

212123012323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5671876.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 212123012323 its reverse (323210321212), we get a palindrome (535333333535).

The spelling of 212123012323 in words is "two hundred twelve billion, one hundred twenty-three million, twelve thousand, three hundred twenty-three".