213132321123 has 4 divisors (see below), whose sum is σ = 284176428168. Its totient is φ = 142088214080.

The previous prime is 213132321113. The next prime is 213132321163. The reversal of 213132321123 is 321123231312.

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 213132321123 - 2²⁰ = 213131272547 is a prime.

It is a super-2 number, since 2×213132321123² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213132321093 and 213132321102.

It is not an unprimeable number, because it can be changed into a prime (213132321113) 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, 35522053518 + ... + 35522053523.

It is an arithmetic number, because the mean of its divisors is an integer number (71044107042).

Almost surely, 2^213132321123 is an apocalyptic number.

213132321123 is a deficient number, since it is larger than the sum of its proper divisors (71044107045).

213132321123 is an equidigital number, since it uses as much as digits as its factorization.

213132321123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71044107044.

The product of its digits is 1296, while the sum is 24.

Adding to 213132321123 its reverse (321123231312), we get a palindrome (534255552435).

The spelling of 213132321123 in words is "two hundred thirteen billion, one hundred thirty-two million, three hundred twenty-one thousand, one hundred twenty-three".