131223122313 has 4 divisors (see below), whose sum is σ = 174964163088. Its totient is φ = 87482081540.

The previous prime is 131223122309. The next prime is 131223122333. The reversal of 131223122313 is 313221322131.

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 a cyclic number.

It is not a de Polignac number, because 131223122313 - 2² = 131223122309 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131223122333) 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, 21870520383 + ... + 21870520388.

It is an arithmetic number, because the mean of its divisors is an integer number (43741040772).

Almost surely, 2^131223122313 is an apocalyptic number.

It is an amenable number.

131223122313 is a deficient number, since it is larger than the sum of its proper divisors (43741040775).

131223122313 is an equidigital number, since it uses as much as digits as its factorization.

131223122313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43741040774.

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

Adding to 131223122313 its reverse (313221322131), we get a palindrome (444444444444).

The spelling of 131223122313 in words is "one hundred thirty-one billion, two hundred twenty-three million, one hundred twenty-two thousand, three hundred thirteen".