131223122320331 has 4 divisors (see below), whose sum is σ = 131442192642000. Its totient is φ = 131004051998664.

The previous prime is 131223122320309. The next prime is 131223122320363. The reversal of 131223122320331 is 133023221322131.

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 131223122320331 - 2⁴⁶ = 60854378142667 is a prime.

It is a super-2 number, since 2×131223122320331² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131223122320294 and 131223122320303.

It is not an unprimeable number, because it can be changed into a prime (131223122320931) 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, 109535159936 + ... + 109535161133.

It is an arithmetic number, because the mean of its divisors is an integer number (32860548160500).

Almost surely, 2^{131223122320331} is an apocalyptic number.

131223122320331 is a deficient number, since it is larger than the sum of its proper divisors (219070321669).

131223122320331 is an equidigital number, since it uses as much as digits as its factorization.

131223122320331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219070321668.

The product of its (nonzero) digits is 7776, while the sum is 29.

Adding to 131223122320331 its reverse (133023221322131), we get a palindrome (264246343642462).

The spelling of 131223122320331 in words is "one hundred thirty-one trillion, two hundred twenty-three billion, one hundred twenty-two million, three hundred twenty thousand, three hundred thirty-one".