131311103226221 has 2 divisors, whose sum is σ = 131311103226222. Its totient is φ = 131311103226220.

The previous prime is 131311103226167. The next prime is 131311103226229. The reversal of 131311103226221 is 122622301113131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107939341456996 + 23371761769225 = 10389386^2 + 4834435^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131311103226221 is a prime.

It is a super-2 number, since 2×131311103226221² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131311103226229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65655551613110 + 65655551613111.

It is an arithmetic number, because the mean of its divisors is an integer number (65655551613111).

Almost surely, 2^{131311103226221} is an apocalyptic number.

It is an amenable number.

131311103226221 is a deficient number, since it is larger than the sum of its proper divisors (1).

131311103226221 is an equidigital number, since it uses as much as digits as its factorization.

131311103226221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

Adding to 131311103226221 its reverse (122622301113131), we get a palindrome (253933404339352).

The spelling of 131311103226221 in words is "one hundred thirty-one trillion, three hundred eleven billion, one hundred three million, two hundred twenty-six thousand, two hundred twenty-one".