213232312123 has 4 divisors (see below), whose sum is σ = 215430583480. Its totient is φ = 211034040768.

The previous prime is 213232312099. The next prime is 213232312133. The reversal of 213232312123 is 321213232312.

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 213232312123 - 2⁵ = 213232312091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213232312133) 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, 1099135533 + ... + 1099135726.

It is an arithmetic number, because the mean of its divisors is an integer number (53857645870).

Almost surely, 2^213232312123 is an apocalyptic number.

213232312123 is a deficient number, since it is larger than the sum of its proper divisors (2198271357).

213232312123 is an equidigital number, since it uses as much as digits as its factorization.

213232312123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2198271356.

The product of its digits is 2592, while the sum is 25.

Adding to 213232312123 its reverse (321213232312), we get a palindrome (534445544435).

The spelling of 213232312123 in words is "two hundred thirteen billion, two hundred thirty-two million, three hundred twelve thousand, one hundred twenty-three".