213111231323 has 4 divisors (see below), whose sum is σ = 216604858128. Its totient is φ = 209617604520.

The previous prime is 213111231301. The next prime is 213111231461. The reversal of 213111231323 is 323132111312.

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 213111231323 - 2¹⁸ = 213110969179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213111231623) 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, 1746813311 + ... + 1746813432.

It is an arithmetic number, because the mean of its divisors is an integer number (54151214532).

Almost surely, 2^213111231323 is an apocalyptic number.

213111231323 is a deficient number, since it is larger than the sum of its proper divisors (3493626805).

213111231323 is an equidigital number, since it uses as much as digits as its factorization.

213111231323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3493626804.

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

Adding to 213111231323 its reverse (323132111312), we get a palindrome (536243342635).

The spelling of 213111231323 in words is "two hundred thirteen billion, one hundred eleven million, two hundred thirty-one thousand, three hundred twenty-three".