221131112111317 has 2 divisors, whose sum is σ = 221131112111318. Its totient is φ = 221131112111316.

The previous prime is 221131112111291. The next prime is 221131112111323. The reversal of 221131112111317 is 713111211131122.

221131112111317 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220913495459281 + 217616652036 = 14863159^2 + 466494^2 .

It is a cyclic number.

It is not a de Polignac number, because 221131112111317 - 2⁴⁷ = 80393623755989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221131112711317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110565556055658 + 110565556055659.

It is an arithmetic number, because the mean of its divisors is an integer number (110565556055659).

Almost surely, 2^{221131112111317} is an apocalyptic number.

It is an amenable number.

221131112111317 is a deficient number, since it is larger than the sum of its proper divisors (1).

221131112111317 is an equidigital number, since it uses as much as digits as its factorization.

221131112111317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 28.

Adding to 221131112111317 its reverse (713111211131122), we get a palindrome (934242323242439).

The spelling of 221131112111317 in words is "two hundred twenty-one trillion, one hundred thirty-one billion, one hundred twelve million, one hundred eleven thousand, three hundred seventeen".