131303203021 has 2 divisors, whose sum is σ = 131303203022. Its totient is φ = 131303203020.

The previous prime is 131303203001. The next prime is 131303203069. The reversal of 131303203021 is 120302303131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125822021796 + 5481181225 = 354714^2 + 74035^2 .

It is a cyclic number.

It is not a de Polignac number, because 131303203021 - 2⁹ = 131303202509 is a prime.

It is a super-2 number, since 2×131303203021² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131303203021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131303203001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65651601510 + 65651601511.

It is an arithmetic number, because the mean of its divisors is an integer number (65651601511).

Almost surely, 2^131303203021 is an apocalyptic number.

It is an amenable number.

131303203021 is a deficient number, since it is larger than the sum of its proper divisors (1).

131303203021 is an equidigital number, since it uses as much as digits as its factorization.

131303203021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 131303203021 its reverse (120302303131), we get a palindrome (251605506152).

The spelling of 131303203021 in words is "one hundred thirty-one billion, three hundred three million, two hundred three thousand, twenty-one".