22012271 has 2 divisors, whose sum is σ = 22012272. Its totient is φ = 22012270.

The previous prime is 22012267. The next prime is 22012273. The reversal of 22012271 is 17221022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22012271 - 2² = 22012267 is a prime.

Together with 22012273, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22012273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11006135 + 11006136.

It is an arithmetic number, because the mean of its divisors is an integer number (11006136).

Almost surely, 2^22012271 is an apocalyptic number.

22012271 is a deficient number, since it is larger than the sum of its proper divisors (1).

22012271 is an equidigital number, since it uses as much as digits as its factorization.

22012271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 22012271 is about 4691.7236704648. The cubic root of 22012271 is about 280.2560200865.

Adding to 22012271 its reverse (17221022), we get a palindrome (39233293).

The spelling of 22012271 in words is "twenty-two million, twelve thousand, two hundred seventy-one".