22021216471 has 2 divisors, whose sum is σ = 22021216472. Its totient is φ = 22021216470.

The previous prime is 22021216447. The next prime is 22021216499. The reversal of 22021216471 is 17461212022.

It is an a-pointer prime, because the next prime (22021216499) can be obtained adding 22021216471 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22021216471 - 2⁹ = 22021215959 is a prime.

It is a super-3 number, since 3×22021216471³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22021216411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11010608235 + 11010608236.

It is an arithmetic number, because the mean of its divisors is an integer number (11010608236).

Almost surely, 2^22021216471 is an apocalyptic number.

22021216471 is a deficient number, since it is larger than the sum of its proper divisors (1).

22021216471 is an equidigital number, since it uses as much as digits as its factorization.

22021216471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 28.

Adding to 22021216471 its reverse (17461212022), we get a palindrome (39482428493).

The spelling of 22021216471 in words is "twenty-two billion, twenty-one million, two hundred sixteen thousand, four hundred seventy-one".