213132313123 has 4 divisors (see below), whose sum is σ = 213577266240. Its totient is φ = 212687360008.

The previous prime is 213132313111. The next prime is 213132313129. The reversal of 213132313123 is 321313231312.

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 213132313123 - 2⁵ = 213132313091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213132313129) 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, 222475840 + ... + 222476797.

It is an arithmetic number, because the mean of its divisors is an integer number (53394316560).

Almost surely, 2^213132313123 is an apocalyptic number.

213132313123 is a deficient number, since it is larger than the sum of its proper divisors (444953117).

213132313123 is an equidigital number, since it uses as much as digits as its factorization.

213132313123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444953116.

The product of its digits is 1944, while the sum is 25.

Adding to 213132313123 its reverse (321313231312), we get a palindrome (534445544435).

It can be divided in two parts, 21313231312 and 3, that multiplied together give a palindrome (63939693936).

The spelling of 213132313123 in words is "two hundred thirteen billion, one hundred thirty-two million, three hundred thirteen thousand, one hundred twenty-three".