11131123 has 2 divisors, whose sum is σ = 11131124. Its totient is φ = 11131122.

The previous prime is 11131111. The next prime is 11131163. The reversal of 11131123 is 32113111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11131123 - 2⁹ = 11130611 is a prime.

It is a super-2 number, since 2×11131123² = 247803798482258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11131163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5565561 + 5565562.

It is an arithmetic number, because the mean of its divisors is an integer number (5565562).

Almost surely, 2^11131123 is an apocalyptic number.

11131123 is a deficient number, since it is larger than the sum of its proper divisors (1).

11131123 is an equidigital number, since it uses as much as digits as its factorization.

11131123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18, while the sum is 13.

The square root of 11131123 is about 3336.3337662770. Note that the first 3 decimals coincide. The cubic root of 11131123 is about 223.2782025251.

Adding to 11131123 its reverse (32113111), we get a palindrome (43244234).

The spelling of 11131123 in words is "eleven million, one hundred thirty-one thousand, one hundred twenty-three".