11132131121 has 4 divisors (see below), whose sum is σ = 11133086244. Its totient is φ = 11131176000.

The previous prime is 11132131117. The next prime is 11132131181. The reversal of 11132131121 is 12113123111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5247553600 + 5884577521 = 72440^2 + 76711^2 .

It is a cyclic number.

It is not a de Polignac number, because 11132131121 - 2² = 11132131117 is a prime.

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 11132131121.

It is not an unprimeable number, because it can be changed into a prime (11132131181) 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, 459860 + ... + 483461.

It is an arithmetic number, because the mean of its divisors is an integer number (2783271561).

Almost surely, 2^11132131121 is an apocalyptic number.

It is an amenable number.

11132131121 is a deficient number, since it is larger than the sum of its proper divisors (955123).

11132131121 is an equidigital number, since it uses as much as digits as its factorization.

11132131121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955122.

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

Adding to 11132131121 its reverse (12113123111), we get a palindrome (23245254232).

The spelling of 11132131121 in words is "eleven billion, one hundred thirty-two million, one hundred thirty-one thousand, one hundred twenty-one".