11131123031 has 16 divisors (see below), whose sum is σ = 13833642816. Its totient is φ = 8737030656.

The previous prime is 11131123027. The next prime is 11131123043. The reversal of 11131123031 is 13032113111.

It is a cyclic number.

It is not a de Polignac number, because 11131123031 - 2² = 11131123027 is a prime.

It is a super-2 number, since 2×11131123031² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11131123831) 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, 1259636 + ... + 1268441.

It is an arithmetic number, because the mean of its divisors is an integer number (864602676).

Almost surely, 2^11131123031 is an apocalyptic number.

11131123031 is a deficient number, since it is larger than the sum of its proper divisors (2702519785).

11131123031 is a wasteful number, since it uses less digits than its factorization.

11131123031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2528138.

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

Adding to 11131123031 its reverse (13032113111), we get a palindrome (24163236142).

The spelling of 11131123031 in words is "eleven billion, one hundred thirty-one million, one hundred twenty-three thousand, thirty-one".