11231131121 has 8 divisors (see below), whose sum is σ = 12852189504. Its totient is φ = 9614225520.

The previous prime is 11231131117. The next prime is 11231131147. The reversal of 11231131121 is 12113113211.

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

It is a cyclic number.

It is not a de Polignac number, because 11231131121 - 2² = 11231131117 is a prime.

It is a super-2 number, since 2×11231131121² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11231131121.

It is not an unprimeable number, because it can be changed into a prime (11231131111) 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, 1032395 + ... + 1043216.

It is an arithmetic number, because the mean of its divisors is an integer number (1606523688).

Almost surely, 2^11231131121 is an apocalyptic number.

It is an amenable number.

11231131121 is a deficient number, since it is larger than the sum of its proper divisors (1621058383).

11231131121 is an equidigital number, since it uses as much as digits as its factorization.

11231131121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2076391.

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

Adding to 11231131121 its reverse (12113113211), we get a palindrome (23344244332).

It can be divided in two parts, 11 and 231131121, that added together give a palindrome (231131132).

The spelling of 11231131121 in words is "eleven billion, two hundred thirty-one million, one hundred thirty-one thousand, one hundred twenty-one".