11123122131 has 48 divisors (see below), whose sum is σ = 18074833920. Its totient is φ = 6533516160.

The previous prime is 11123122039. The next prime is 11123122141. The reversal of 11123122131 is 13122132111.

It is not a de Polignac number, because 11123122131 - 2¹⁷ = 11122991059 is a prime.

It is a super-2 number, since 2×11123122131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11123122141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 467655 + ... + 490863.

It is an arithmetic number, because the mean of its divisors is an integer number (376559040).

Almost surely, 2^11123122131 is an apocalyptic number.

11123122131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11123122131 is a deficient number, since it is larger than the sum of its proper divisors (6951711789).

11123122131 is a wasteful number, since it uses less digits than its factorization.

11123122131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23376 (or 23373 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 11123122131 its reverse (13122132111), we get a palindrome (24245254242).

The spelling of 11123122131 in words is "eleven billion, one hundred twenty-three million, one hundred twenty-two thousand, one hundred thirty-one".