213111221233 has 4 divisors (see below), whose sum is σ = 222376926528. Its totient is φ = 203845515940.

The previous prime is 213111221227. The next prime is 213111221251. The reversal of 213111221233 is 332122111312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213111221233 - 2²⁵ = 213077666801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213111221293) 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, 4632852613 + ... + 4632852658.

It is an arithmetic number, because the mean of its divisors is an integer number (55594231632).

Almost surely, 2^213111221233 is an apocalyptic number.

213111221233 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

213111221233 is a deficient number, since it is larger than the sum of its proper divisors (9265705295).

213111221233 is an equidigital number, since it uses as much as digits as its factorization.

213111221233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9265705294.

The product of its digits is 432, while the sum is 22.

Adding to 213111221233 its reverse (332122111312), we get a palindrome (545233332545).

The spelling of 213111221233 in words is "two hundred thirteen billion, one hundred eleven million, two hundred twenty-one thousand, two hundred thirty-three".