11231121131 has 4 divisors (see below), whose sum is σ = 11618401200. Its totient is φ = 10843841064.

The previous prime is 11231121127. The next prime is 11231121163. The reversal of 11231121131 is 13112113211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13112113211 = 739 ⋅17743049.

It is a cyclic number.

It is not a de Polignac number, because 11231121131 - 2² = 11231121127 is a prime.

It is a super-2 number, since 2×11231121131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11231121631) 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, 193639991 + ... + 193640048.

It is an arithmetic number, because the mean of its divisors is an integer number (2904600300).

Almost surely, 2^11231121131 is an apocalyptic number.

11231121131 is a deficient number, since it is larger than the sum of its proper divisors (387280069).

11231121131 is an equidigital number, since it uses as much as digits as its factorization.

11231121131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387280068.

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

Adding to 11231121131 its reverse (13112113211), we get a palindrome (24343234342).

The spelling of 11231121131 in words is "eleven billion, two hundred thirty-one million, one hundred twenty-one thousand, one hundred thirty-one".