131220323033 has 2 divisors, whose sum is σ = 131220323034. Its totient is φ = 131220323032.

The previous prime is 131220323011. The next prime is 131220323077. The reversal of 131220323033 is 330323022131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127771932304 + 3448390729 = 357452^2 + 58723^2 .

It is a cyclic number.

It is not a de Polignac number, because 131220323033 - 2⁸ = 131220322777 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (131228323033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65610161516 + 65610161517.

It is an arithmetic number, because the mean of its divisors is an integer number (65610161517).

Almost surely, 2^131220323033 is an apocalyptic number.

It is an amenable number.

131220323033 is a deficient number, since it is larger than the sum of its proper divisors (1).

131220323033 is an equidigital number, since it uses as much as digits as its factorization.

131220323033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 131220323033 its reverse (330323022131), we get a palindrome (461543345164).

The spelling of 131220323033 in words is "one hundred thirty-one billion, two hundred twenty million, three hundred twenty-three thousand, thirty-three".