213123321222 has 16 divisors (see below), whose sum is σ = 487139020032. Its totient is φ = 60892377480.

The previous prime is 213123321127. The next prime is 213123321227. The reversal of 213123321222 is 222123321312.

213123321222 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 213123321192 and 213123321201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213123321227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2537182354 + ... + 2537182437.

It is an arithmetic number, because the mean of its divisors is an integer number (30446188752).

Almost surely, 2^213123321222 is an apocalyptic number.

213123321222 is an abundant number, since it is smaller than the sum of its proper divisors (274015698810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213123321222 is a wasteful number, since it uses less digits than its factorization.

213123321222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5074364803.

The product of its digits is 1728, while the sum is 24.

Adding to 213123321222 its reverse (222123321312), we get a palindrome (435246642534).

The spelling of 213123321222 in words is "two hundred thirteen billion, one hundred twenty-three million, three hundred twenty-one thousand, two hundred twenty-two".