131403011031221 has 2 divisors, whose sum is σ = 131403011031222. Its totient is φ = 131403011031220.

The previous prime is 131403011031197. The next prime is 131403011031233. The reversal of 131403011031221 is 122130110304131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74222343027121 + 57180668004100 = 8615239^2 + 7561790^2 .

It is an emirp because it is prime and its reverse (122130110304131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131403011031221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131403011031241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65701505515610 + 65701505515611.

It is an arithmetic number, because the mean of its divisors is an integer number (65701505515611).

Almost surely, 2^{131403011031221} is an apocalyptic number.

It is an amenable number.

131403011031221 is a deficient number, since it is larger than the sum of its proper divisors (1).

131403011031221 is an equidigital number, since it uses as much as digits as its factorization.

131403011031221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 131403011031221 its reverse (122130110304131), we get a palindrome (253533121335352).

The spelling of 131403011031221 in words is "one hundred thirty-one trillion, four hundred three billion, eleven million, thirty-one thousand, two hundred twenty-one".