11011122121111 has 8 divisors (see below), whose sum is σ = 12584174044064. Its totient is φ = 9438078817440.

The previous prime is 11011122121091. The next prime is 11011122121171. The reversal of 11011122121111 is 11112122111011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11011122121111 - 2⁷ = 11011122120983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011122121171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 864781 + ... + 4771801.

It is an arithmetic number, because the mean of its divisors is an integer number (1573021755508).

Almost surely, 2^{11011122121111} is an apocalyptic number.

11011122121111 is a deficient number, since it is larger than the sum of its proper divisors (1573051922953).

11011122121111 is an equidigital number, since it uses as much as digits as its factorization.

11011122121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4309641.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 11011122121111 its reverse (11112122111011), we get a palindrome (22123244232122).

It can be divided in two parts, 1101112 and 2121111, that added together give a palindrome (3222223).

The spelling of 11011122121111 in words is "eleven trillion, eleven billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred eleven".