213122111333 has 4 divisors (see below), whose sum is σ = 213133820940. Its totient is φ = 213110401728.

The previous prime is 213122111299. The next prime is 213122111341. The reversal of 213122111333 is 333111221312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 157945040929 + 55177070404 = 397423^2 + 234898^2 .

It is a cyclic number.

It is not a de Polignac number, because 213122111333 - 2¹⁶ = 213122045797 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213122111299 and 213122111308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213122111633) 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, 5827460 + ... + 5863917.

It is an arithmetic number, because the mean of its divisors is an integer number (53283455235).

Almost surely, 2^213122111333 is an apocalyptic number.

It is an amenable number.

213122111333 is a deficient number, since it is larger than the sum of its proper divisors (11709607).

213122111333 is a wasteful number, since it uses less digits than its factorization.

213122111333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11709606.

The product of its digits is 648, while the sum is 23.

Adding to 213122111333 its reverse (333111221312), we get a palindrome (546233332645).

The spelling of 213122111333 in words is "two hundred thirteen billion, one hundred twenty-two million, one hundred eleven thousand, three hundred thirty-three".