20211111222317 has 2 divisors, whose sum is σ = 20211111222318. Its totient is φ = 20211111222316.

The previous prime is 20211111222283. The next prime is 20211111222359. The reversal of 20211111222317 is 71322211111202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15952443390601 + 4258667831716 = 3994051^2 + 2063654^2 .

It is a cyclic number.

It is not a de Polignac number, because 20211111222317 - 2²⁸ = 20210842786861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20211111222377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105555611158 + 10105555611159.

It is an arithmetic number, because the mean of its divisors is an integer number (10105555611159).

Almost surely, 2^{20211111222317} is an apocalyptic number.

It is an amenable number.

20211111222317 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211111222317 is an equidigital number, since it uses as much as digits as its factorization.

20211111222317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 26.

Adding to 20211111222317 its reverse (71322211111202), we get a palindrome (91533322333519).

The spelling of 20211111222317 in words is "twenty trillion, two hundred eleven billion, one hundred eleven million, two hundred twenty-two thousand, three hundred seventeen".