131342213136221 has 2 divisors, whose sum is σ = 131342213136222. Its totient is φ = 131342213136220.

The previous prime is 131342213136203. The next prime is 131342213136283. The reversal of 131342213136221 is 122631312243131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87004326967321 + 44337886168900 = 9327611^2 + 6658670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131342213136221 is a prime.

It is a super-4 number, since 4×131342213136221⁴ (a number of 58 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131342213136521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65671106568110 + 65671106568111.

It is an arithmetic number, because the mean of its divisors is an integer number (65671106568111).

Almost surely, 2^{131342213136221} is an apocalyptic number.

It is an amenable number.

131342213136221 is a deficient number, since it is larger than the sum of its proper divisors (1).

131342213136221 is an equidigital number, since it uses as much as digits as its factorization.

131342213136221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 35.

Adding to 131342213136221 its reverse (122631312243131), we get a palindrome (253973525379352).

The spelling of 131342213136221 in words is "one hundred thirty-one trillion, three hundred forty-two billion, two hundred thirteen million, one hundred thirty-six thousand, two hundred twenty-one".