131022302221 has 2 divisors, whose sum is σ = 131022302222. Its totient is φ = 131022302220.

The previous prime is 131022302219. The next prime is 131022302227. The reversal of 131022302221 is 122203220131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70007868100 + 61014434121 = 264590^2 + 247011^2 .

It is a cyclic number.

It is not a de Polignac number, because 131022302221 - 2¹ = 131022302219 is a prime.

Together with 131022302219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131022302227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65511151110 + 65511151111.

It is an arithmetic number, because the mean of its divisors is an integer number (65511151111).

Almost surely, 2^131022302221 is an apocalyptic number.

It is an amenable number.

131022302221 is a deficient number, since it is larger than the sum of its proper divisors (1).

131022302221 is an equidigital number, since it uses as much as digits as its factorization.

131022302221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 131022302221 its reverse (122203220131), we get a palindrome (253225522352).

The spelling of 131022302221 in words is "one hundred thirty-one billion, twenty-two million, three hundred two thousand, two hundred twenty-one".