11113211231 has 4 divisors (see below), whose sum is σ = 11596394352. Its totient is φ = 10630028112.

The previous prime is 11113211189. The next prime is 11113211233. The reversal of 11113211231 is 13211231111.

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

It is a cyclic number.

It is not a de Polignac number, because 11113211231 - 2²² = 11109016927 is a prime.

It is a super-2 number, since 2×11113211231² (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 (11113211233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241591526 + ... + 241591571.

It is an arithmetic number, because the mean of its divisors is an integer number (2899098588).

Almost surely, 2^11113211231 is an apocalyptic number.

11113211231 is a deficient number, since it is larger than the sum of its proper divisors (483183121).

11113211231 is an equidigital number, since it uses as much as digits as its factorization.

11113211231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483183120.

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

Adding to 11113211231 its reverse (13211231111), we get a palindrome (24324442342).

It can be divided in two parts, 111 and 13211231, that multiplied together give a palindrome (1466446641).

The spelling of 11113211231 in words is "eleven billion, one hundred thirteen million, two hundred eleven thousand, two hundred thirty-one".