11011221020011 has 4 divisors (see below), whose sum is σ = 11011242492432. Its totient is φ = 11011199547592.

The previous prime is 11011221019969. The next prime is 11011221020021. The reversal of 11011221020011 is 11002012211011.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 11011221020011 - 2²³ = 11011212631403 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11011221019973 and 11011221020000.

It is not an unprimeable number, because it can be changed into a prime (11011221020021) 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, 9947695 + ... + 10999048.

It is an arithmetic number, because the mean of its divisors is an integer number (2752810623108).

Almost surely, 2^{11011221020011} is an apocalyptic number.

11011221020011 is a deficient number, since it is larger than the sum of its proper divisors (21472421).

11011221020011 is an equidigital number, since it uses as much as digits as its factorization.

11011221020011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21472420.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11011221020011 its reverse (11002012211011), we get a palindrome (22013233231022).

The spelling of 11011221020011 in words is "eleven trillion, eleven billion, two hundred twenty-one million, twenty thousand, eleven".