212220323123 has 4 divisors (see below), whose sum is σ = 224703871560. Its totient is φ = 199736774688.

The previous prime is 212220323047. The next prime is 212220323153. The reversal of 212220323123 is 321323022212.

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 212220323123 - 2¹² = 212220319027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212220323153) 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, 6241774193 + ... + 6241774226.

It is an arithmetic number, because the mean of its divisors is an integer number (56175967890).

Almost surely, 2^212220323123 is an apocalyptic number.

212220323123 is a deficient number, since it is larger than the sum of its proper divisors (12483548437).

212220323123 is a wasteful number, since it uses less digits than its factorization.

212220323123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12483548436.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 212220323123 its reverse (321323022212), we get a palindrome (533543345335).

The spelling of 212220323123 in words is "two hundred twelve billion, two hundred twenty million, three hundred twenty-three thousand, one hundred twenty-three".