21022112227 has 2 divisors, whose sum is σ = 21022112228. Its totient is φ = 21022112226.

The previous prime is 21022112213. The next prime is 21022112249. The reversal of 21022112227 is 72221122012.

It is an a-pointer prime, because the next prime (21022112249) can be obtained adding 21022112227 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21022112227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21022112198 and 21022112207.

It is not a weakly prime, because it can be changed into another prime (21022112207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511056113 + 10511056114.

It is an arithmetic number, because the mean of its divisors is an integer number (10511056114).

Almost surely, 2^21022112227 is an apocalyptic number.

21022112227 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022112227 is an equidigital number, since it uses as much as digits as its factorization.

21022112227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 22.

Adding to 21022112227 its reverse (72221122012), we get a palindrome (93243234239).

The spelling of 21022112227 in words is "twenty-one billion, twenty-two million, one hundred twelve thousand, two hundred twenty-seven".