213111122323 has 16 divisors (see below), whose sum is σ = 240016038912. Its totient is φ = 187463052000.

The previous prime is 213111122317. The next prime is 213111122347. The reversal of 213111122323 is 323221111312.

It is a cyclic number.

It is not a de Polignac number, because 213111122323 - 2¹⁷ = 213110991251 is a prime.

It is a super-3 number, since 3×213111122323³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213111122294 and 213111122303.

It is not an unprimeable number, because it can be changed into a prime (213111122023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2842053 + ... + 2916073.

It is an arithmetic number, because the mean of its divisors is an integer number (15001002432).

Almost surely, 2^213111122323 is an apocalyptic number.

213111122323 is a deficient number, since it is larger than the sum of its proper divisors (26904916589).

213111122323 is a wasteful number, since it uses less digits than its factorization.

213111122323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82506.

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

Adding to 213111122323 its reverse (323221111312), we get a palindrome (536332233635).

The spelling of 213111122323 in words is "two hundred thirteen billion, one hundred eleven million, one hundred twenty-two thousand, three hundred twenty-three".