11130021121 has 4 divisors (see below), whose sum is σ = 11131566292. Its totient is φ = 11128475952.

The previous prime is 11130021101. The next prime is 11130021163. The reversal of 11130021121 is 12112003111.

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 8380487025 + 2749534096 = 91545^2 + 52436^2 .

It is a cyclic number.

It is not a de Polignac number, because 11130021121 - 2⁹ = 11130020609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11130021101) 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, 761730 + ... + 776203.

It is an arithmetic number, because the mean of its divisors is an integer number (2782891573).

Almost surely, 2^11130021121 is an apocalyptic number.

It is an amenable number.

11130021121 is a deficient number, since it is larger than the sum of its proper divisors (1545171).

11130021121 is an equidigital number, since it uses as much as digits as its factorization.

11130021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545170.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 11130021121 its reverse (12112003111), we get a palindrome (23242024232).

The spelling of 11130021121 in words is "eleven billion, one hundred thirty million, twenty-one thousand, one hundred twenty-one".