131223441121 has 2 divisors, whose sum is σ = 131223441122. Its totient is φ = 131223441120.

The previous prime is 131223441101. The next prime is 131223441137. The reversal of 131223441121 is 121144322131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89224677025 + 41998764096 = 298705^2 + 204936^2 .

It is a cyclic number.

It is not a de Polignac number, because 131223441121 - 2²³ = 131215052513 is a prime.

It is not a weakly prime, because it can be changed into another prime (131223441101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65611720560 + 65611720561.

It is an arithmetic number, because the mean of its divisors is an integer number (65611720561).

Almost surely, 2^131223441121 is an apocalyptic number.

It is an amenable number.

131223441121 is a deficient number, since it is larger than the sum of its proper divisors (1).

131223441121 is an equidigital number, since it uses as much as digits as its factorization.

131223441121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 25.

Adding to 131223441121 its reverse (121144322131), we get a palindrome (252367763252).

The spelling of 131223441121 in words is "one hundred thirty-one billion, two hundred twenty-three million, four hundred forty-one thousand, one hundred twenty-one".