11123103131 has 16 divisors (see below), whose sum is σ = 13055843328. Its totient is φ = 9277934400.

The previous prime is 11123103119. The next prime is 11123103137. The reversal of 11123103131 is 13130132111.

It is not a de Polignac number, because 11123103131 - 2²⁶ = 11055994267 is a prime.

It is a super-2 number, since 2×11123103131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11123103137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13391 + ... + 149751.

It is an arithmetic number, because the mean of its divisors is an integer number (815990208).

Almost surely, 2^11123103131 is an apocalyptic number.

11123103131 is a deficient number, since it is larger than the sum of its proper divisors (1932740197).

11123103131 is a wasteful number, since it uses less digits than its factorization.

11123103131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136682.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 11123103131 its reverse (13130132111), we get a palindrome (24253235242).

The spelling of 11123103131 in words is "eleven billion, one hundred twenty-three million, one hundred three thousand, one hundred thirty-one".