11121333121 has 2 divisors, whose sum is σ = 11121333122. Its totient is φ = 11121333120.

The previous prime is 11121333077. The next prime is 11121333133. The reversal of 11121333121 is 12133312111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11109160000 + 12173121 = 105400^2 + 3489^2 .

It is an emirp because it is prime and its reverse (12133312111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11121333121 - 2¹⁹ = 11120808833 is a prime.

It is not a weakly prime, because it can be changed into another prime (11121333191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560666560 + 5560666561.

It is an arithmetic number, because the mean of its divisors is an integer number (5560666561).

Almost surely, 2^11121333121 is an apocalyptic number.

It is an amenable number.

11121333121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121333121 is an equidigital number, since it uses as much as digits as its factorization.

11121333121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108, while the sum is 19.

Adding to 11121333121 its reverse (12133312111), we get a palindrome (23254645232).

It can be divided in two parts, 11 and 121333121, that multiplied together give a palindrome (1334664331).

The spelling of 11121333121 in words is "eleven billion, one hundred twenty-one million, three hundred thirty-three thousand, one hundred twenty-one".