11133311231 has 16 divisors (see below), whose sum is σ = 13430822400. Its totient is φ = 9015362208.

The previous prime is 11133311227. The next prime is 11133311251. The reversal of 11133311231 is 13211333111.

It is a cyclic number.

It is not a de Polignac number, because 11133311231 - 2² = 11133311227 is a prime.

It is a super-2 number, since 2×11133311231² (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 (11133311251) 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, 68840 + ... + 164333.

It is an arithmetic number, because the mean of its divisors is an integer number (839426400).

Almost surely, 2^11133311231 is an apocalyptic number.

11133311231 is a deficient number, since it is larger than the sum of its proper divisors (2297511169).

11133311231 is a wasteful number, since it uses less digits than its factorization.

11133311231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233558.

The product of its digits is 162, while the sum is 20.

Adding to 11133311231 its reverse (13211333111), we get a palindrome (24344644342).

The spelling of 11133311231 in words is "eleven billion, one hundred thirty-three million, three hundred eleven thousand, two hundred thirty-one".