213123011313 has 4 divisors (see below), whose sum is σ = 284164015088. Its totient is φ = 142082007540.

The previous prime is 213123011293. The next prime is 213123011347. The reversal of 213123011313 is 313110321312.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 213123011313 - 2¹² = 213123007217 is a prime.

It is a super-2 number, since 2×213123011313² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213123011313.

It is not an unprimeable number, because it can be changed into a prime (213123012313) 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, 35520501883 + ... + 35520501888.

It is an arithmetic number, because the mean of its divisors is an integer number (71041003772).

Almost surely, 2^213123011313 is an apocalyptic number.

It is an amenable number.

213123011313 is a deficient number, since it is larger than the sum of its proper divisors (71041003775).

213123011313 is an equidigital number, since it uses as much as digits as its factorization.

213123011313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71041003774.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 213123011313 its reverse (313110321312), we get a palindrome (526233332625).

The spelling of 213123011313 in words is "two hundred thirteen billion, one hundred twenty-three million, eleven thousand, three hundred thirteen".