212133211423 has 4 divisors (see below), whose sum is σ = 242437955920. Its totient is φ = 181828466928.

The previous prime is 212133211393. The next prime is 212133211427. The reversal of 212133211423 is 324112331212.

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 212133211423 - 2¹⁷ = 212133080351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212133211427) 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, 15152372238 + ... + 15152372251.

It is an arithmetic number, because the mean of its divisors is an integer number (60609488980).

Almost surely, 2^212133211423 is an apocalyptic number.

212133211423 is a deficient number, since it is larger than the sum of its proper divisors (30304744497).

212133211423 is an equidigital number, since it uses as much as digits as its factorization.

212133211423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30304744496.

The product of its digits is 1728, while the sum is 25.

Adding to 212133211423 its reverse (324112331212), we get a palindrome (536245542635).

The spelling of 212133211423 in words is "two hundred twelve billion, one hundred thirty-three million, two hundred eleven thousand, four hundred twenty-three".