11132111231 has 4 divisors (see below), whose sum is σ = 11184870264. Its totient is φ = 11079352200.

The previous prime is 11132111183. The next prime is 11132111233. The reversal of 11132111231 is 13211123111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11132111231 is a prime.

It is a super-2 number, since 2×11132111231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11132111233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26379200 + ... + 26379621.

It is an arithmetic number, because the mean of its divisors is an integer number (2796217566).

Almost surely, 2^11132111231 is an apocalyptic number.

11132111231 is a deficient number, since it is larger than the sum of its proper divisors (52759033).

11132111231 is an equidigital number, since it uses as much as digits as its factorization.

11132111231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52759032.

The product of its digits is 36, while the sum is 17.

Adding to 11132111231 its reverse (13211123111), we get a palindrome (24343234342).

It can be divided in two parts, 11 and 132111231, that multiplied together give a palindrome (1453223541).

The spelling of 11132111231 in words is "eleven billion, one hundred thirty-two million, one hundred eleven thousand, two hundred thirty-one".