1131271223 has 2 divisors, whose sum is σ = 1131271224. Its totient is φ = 1131271222.

The previous prime is 1131271181. The next prime is 1131271249. The reversal of 1131271223 is 3221721311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1131271223 - 2¹² = 1131267127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131270223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565635611 + 565635612.

It is an arithmetic number, because the mean of its divisors is an integer number (565635612).

Almost surely, 2^1131271223 is an apocalyptic number.

1131271223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131271223 is an equidigital number, since it uses as much as digits as its factorization.

1131271223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 23.

The square root of 1131271223 is about 33634.3756148379. The cubic root of 1131271223 is about 1041.9708753002.

Adding to 1131271223 its reverse (3221721311), we get a palindrome (4352992534).

The spelling of 1131271223 in words is "one billion, one hundred thirty-one million, two hundred seventy-one thousand, two hundred twenty-three".