131020203230321 has 2 divisors, whose sum is σ = 131020203230322. Its totient is φ = 131020203230320.

The previous prime is 131020203230261. The next prime is 131020203230327. The reversal of 131020203230321 is 123032302020131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66080055713296 + 64940147517025 = 8128964^2 + 8058545^2 .

It is a cyclic number.

It is not a de Polignac number, because 131020203230321 - 2³⁴ = 131003023361137 is a prime.

It is not a weakly prime, because it can be changed into another prime (131020203230327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65510101615160 + 65510101615161.

It is an arithmetic number, because the mean of its divisors is an integer number (65510101615161).

Almost surely, 2^{131020203230321} is an apocalyptic number.

It is an amenable number.

131020203230321 is a deficient number, since it is larger than the sum of its proper divisors (1).

131020203230321 is an equidigital number, since it uses as much as digits as its factorization.

131020203230321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 131020203230321 its reverse (123032302020131), we get a palindrome (254052505250452).

The spelling of 131020203230321 in words is "one hundred thirty-one trillion, twenty billion, two hundred three million, two hundred thirty thousand, three hundred twenty-one".