11011332121 has 4 divisors (see below), whose sum is σ = 11108777652. Its totient is φ = 10913886592.

The previous prime is 11011332083. The next prime is 11011332149. The reversal of 11011332121 is 12123311011.

It is a happy number.

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 2410810000 + 8600522121 = 49100^2 + 92739^2 .

It is a cyclic number.

It is not a de Polignac number, because 11011332121 - 2¹⁵ = 11011299353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11011332095 and 11011332104.

It is not an unprimeable number, because it can be changed into a prime (11011333121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48722596 + ... + 48722821.

It is an arithmetic number, because the mean of its divisors is an integer number (2777194413).

Almost surely, 2^11011332121 is an apocalyptic number.

It is an amenable number.

11011332121 is a deficient number, since it is larger than the sum of its proper divisors (97445531).

11011332121 is an equidigital number, since it uses as much as digits as its factorization.

11011332121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97445530.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 11011332121 its reverse (12123311011), we get a palindrome (23134643132).

The spelling of 11011332121 in words is "eleven billion, eleven million, three hundred thirty-two thousand, one hundred twenty-one".