11011011211121 has 4 divisors (see below), whose sum is σ = 11011123846512. Its totient is φ = 11010898575732.

The previous prime is 11011011211103. The next prime is 11011011211129. The reversal of 11011011211121 is 12111211011011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11011011211121 - 2²² = 11011007016817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11011011211096 and 11011011211105.

It is not an unprimeable number, because it can be changed into a prime (11011011211129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56170931 + ... + 56366616.

It is an arithmetic number, because the mean of its divisors is an integer number (2752780961628).

Almost surely, 2^{11011011211121} is an apocalyptic number.

It is an amenable number.

11011011211121 is a deficient number, since it is larger than the sum of its proper divisors (112635391).

11011011211121 is an equidigital number, since it uses as much as digits as its factorization.

11011011211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112635390.

The product of its (nonzero) digits is 4, while the sum is 14.

Adding to 11011011211121 its reverse (12111211011011), we get a palindrome (23122222222132).

The spelling of 11011011211121 in words is "eleven trillion, eleven billion, eleven million, two hundred eleven thousand, one hundred twenty-one".