11031133121 has 4 divisors (see below), whose sum is σ = 11329271892. Its totient is φ = 10732994352.

The previous prime is 11031133103. The next prime is 11031133133. The reversal of 11031133121 is 12133113011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12133113011 = 79 ⋅153583709.

It can be written as a sum of positive squares in 2 ways, for example, as 6046773121 + 4984360000 = 77761^2 + 70600^2 .

It is a cyclic number.

It is not a de Polignac number, because 11031133121 - 2²² = 11026938817 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 11031133121.

It is not an unprimeable number, because it can be changed into a prime (11031133151) 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, 149069330 + ... + 149069403.

It is an arithmetic number, because the mean of its divisors is an integer number (2832317973).

Almost surely, 2^11031133121 is an apocalyptic number.

It is an amenable number.

11031133121 is a deficient number, since it is larger than the sum of its proper divisors (298138771).

11031133121 is an equidigital number, since it uses as much as digits as its factorization.

11031133121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298138770.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 11031133121 its reverse (12133113011), we get a palindrome (23164246132).

The spelling of 11031133121 in words is "eleven billion, thirty-one million, one hundred thirty-three thousand, one hundred twenty-one".