11331121121 has 2 divisors, whose sum is σ = 11331121122. Its totient is φ = 11331121120.

The previous prime is 11331121079. The next prime is 11331121141. The reversal of 11331121121 is 12112113311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6612942400 + 4718178721 = 81320^2 + 68689^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11331121121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11331121121.

It is not a weakly prime, because it can be changed into another prime (11331121141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5665560560 + 5665560561.

It is an arithmetic number, because the mean of its divisors is an integer number (5665560561).

Almost surely, 2^11331121121 is an apocalyptic number.

It is an amenable number.

11331121121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11331121121 is an equidigital number, since it uses as much as digits as its factorization.

11331121121 is an evil number, because the sum of its binary digits is even.

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

Adding to 11331121121 its reverse (12112113311), we get a palindrome (23443234432).

The spelling of 11331121121 in words is "eleven billion, three hundred thirty-one million, one hundred twenty-one thousand, one hundred twenty-one".