11223131 has 2 divisors, whose sum is σ = 11223132. Its totient is φ = 11223130.

The previous prime is 11223109. The next prime is 11223133. The reversal of 11223131 is 13132211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11223131 - 2⁶ = 11223067 is a prime.

It is a super-2 number, since 2×11223131² = 251917338886322, which contains 22 as substring.

Together with 11223133, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11223133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5611565 + 5611566.

It is an arithmetic number, because the mean of its divisors is an integer number (5611566).

Almost surely, 2^11223131 is an apocalyptic number.

11223131 is a deficient number, since it is larger than the sum of its proper divisors (1).

11223131 is an equidigital number, since it uses as much as digits as its factorization.

11223131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36, while the sum is 14.

The square root of 11223131 is about 3350.0941777807. The cubic root of 11223131 is about 223.8917086570.

Adding to 11223131 its reverse (13132211), we get a palindrome (24355342).

The spelling of 11223131 in words is "eleven million, two hundred twenty-three thousand, one hundred thirty-one".