21220112202287 has 2 divisors, whose sum is σ = 21220112202288. Its totient is φ = 21220112202286.

The previous prime is 21220112202077. The next prime is 21220112202313. The reversal of 21220112202287 is 78220221102212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21220112202287 - 2²⁸ = 21219843766831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21220112205287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610056101143 + 10610056101144.

It is an arithmetic number, because the mean of its divisors is an integer number (10610056101144).

Almost surely, 2^{21220112202287} is an apocalyptic number.

21220112202287 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220112202287 is an equidigital number, since it uses as much as digits as its factorization.

21220112202287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 32.

Adding to 21220112202287 its reverse (78220221102212), we get a palindrome (99440333304499).

The spelling of 21220112202287 in words is "twenty-one trillion, two hundred twenty billion, one hundred twelve million, two hundred two thousand, two hundred eighty-seven".