20121222271 has 2 divisors, whose sum is σ = 20121222272. Its totient is φ = 20121222270.

The previous prime is 20121222269. The next prime is 20121222293. The reversal of 20121222271 is 17222212102.

It is an a-pointer prime, because the next prime (20121222293) can be obtained adding 20121222271 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20121222271 - 2¹ = 20121222269 is a prime.

Together with 20121222269, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121222971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060611135 + 10060611136.

It is an arithmetic number, because the mean of its divisors is an integer number (10060611136).

Almost surely, 2^20121222271 is an apocalyptic number.

20121222271 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121222271 is an equidigital number, since it uses as much as digits as its factorization.

20121222271 is an evil number, because the sum of its binary digits is even.

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

Adding to 20121222271 its reverse (17222212102), we get a palindrome (37343434373).

The spelling of 20121222271 in words is "twenty billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred seventy-one".