212120311310123 has 4 divisors (see below), whose sum is σ = 212965412152248. Its totient is φ = 211275210468000.

The previous prime is 212120311310071. The next prime is 212120311310147. The reversal of 212120311310123 is 321013113021212.

It is a happy number.

212120311310123 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 a cyclic number.

It is not a de Polignac number, because 212120311310123 - 2¹⁰ = 212120311309099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212120311210123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422550420686 + ... + 422550421187.

It is an arithmetic number, because the mean of its divisors is an integer number (53241353038062).

Almost surely, 2^{212120311310123} is an apocalyptic number.

212120311310123 is a deficient number, since it is larger than the sum of its proper divisors (845100842125).

212120311310123 is an equidigital number, since it uses as much as digits as its factorization.

212120311310123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845100842124.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 212120311310123 its reverse (321013113021212), we get a palindrome (533133424331335).

The spelling of 212120311310123 in words is "two hundred twelve trillion, one hundred twenty billion, three hundred eleven million, three hundred ten thousand, one hundred twenty-three".