1122156271 has 2 divisors, whose sum is σ = 1122156272. Its totient is φ = 1122156270.

The previous prime is 1122156257. The next prime is 1122156307. The reversal of 1122156271 is 1726512211.

It is a weak prime.

It is an emirp because it is prime and its reverse (1726512211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1122156271 - 2¹⁹ = 1121631983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1122156241) 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, 561078135 + 561078136.

It is an arithmetic number, because the mean of its divisors is an integer number (561078136).

Almost surely, 2^1122156271 is an apocalyptic number.

1122156271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122156271 is an equidigital number, since it uses as much as digits as its factorization.

1122156271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 28.

The square root of 1122156271 is about 33498.6010304908. The cubic root of 1122156271 is about 1039.1648469684.

Adding to 1122156271 its reverse (1726512211), we get a palindrome (2848668482).

The spelling of 1122156271 in words is "one billion, one hundred twenty-two million, one hundred fifty-six thousand, two hundred seventy-one".