11011011121211 has 4 divisors (see below), whose sum is σ = 11015510923872. Its totient is φ = 11006511318552.

The previous prime is 11011011121189. The next prime is 11011011121267. The reversal of 11011011121211 is 11212111011011.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11011011121211 is a prime.

It is a super-2 number, since 2×11011011121211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11011011121811) 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, 2249897660 + ... + 2249902553.

It is an arithmetic number, because the mean of its divisors is an integer number (2753877730968).

Almost surely, 2^{11011011121211} is an apocalyptic number.

11011011121211 is a deficient number, since it is larger than the sum of its proper divisors (4499802661).

11011011121211 is an equidigital number, since it uses as much as digits as its factorization.

11011011121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4499802660.

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

Adding to 11011011121211 its reverse (11212111011011), we get a palindrome (22223122132222).

The spelling of 11011011121211 in words is "eleven trillion, eleven billion, eleven million, one hundred twenty-one thousand, two hundred eleven".