11231311121 has 8 divisors (see below), whose sum is σ = 11394300960. Its totient is φ = 11068568352.

The previous prime is 11231311111. The next prime is 11231311153. The reversal of 11231311121 is 12111313211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11231311121 - 2³⁰ = 10157569297 is a prime.

It is a super-2 number, since 2×11231311121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11231311121.

It is not an unprimeable number, because it can be changed into a prime (11231311111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30806 + ... + 153008.

It is an arithmetic number, because the mean of its divisors is an integer number (1424287620).

Almost surely, 2^11231311121 is an apocalyptic number.

It is an amenable number.

11231311121 is a deficient number, since it is larger than the sum of its proper divisors (162989839).

11231311121 is a wasteful number, since it uses less digits than its factorization.

11231311121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123535.

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

Adding to 11231311121 its reverse (12111313211), we get a palindrome (23342624332).

The spelling of 11231311121 in words is "eleven billion, two hundred thirty-one million, three hundred eleven thousand, one hundred twenty-one".