131223103103231 has 4 divisors (see below), whose sum is σ = 131224512182472. Its totient is φ = 131221694023992.

The previous prime is 131223103103227. The next prime is 131223103103233. The reversal of 131223103103231 is 132301301322131.

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 131223103103231 - 2² = 131223103103227 is a prime.

It is a super-2 number, since 2×131223103103231² (a number of 29 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 131223103103231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131223103103233) 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, 704399921 + ... + 704586186.

It is an arithmetic number, because the mean of its divisors is an integer number (32806128045618).

Almost surely, 2^{131223103103231} is an apocalyptic number.

131223103103231 is a deficient number, since it is larger than the sum of its proper divisors (1409079241).

131223103103231 is an equidigital number, since it uses as much as digits as its factorization.

131223103103231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1409079240.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 131223103103231 its reverse (132301301322131), we get a palindrome (263524404425362).

The spelling of 131223103103231 in words is "one hundred thirty-one trillion, two hundred twenty-three billion, one hundred three million, one hundred three thousand, two hundred thirty-one".