11220012011 has 4 divisors (see below), whose sum is σ = 12083089872. Its totient is φ = 10356934152.

The previous prime is 11220011981. The next prime is 11220012047. The reversal of 11220012011 is 11021002211.

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 11220012011 - 2⁶ = 11220011947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11220011983 and 11220012001.

It is not an unprimeable number, because it can be changed into a prime (11220042011) 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, 431538911 + ... + 431538936.

It is an arithmetic number, because the mean of its divisors is an integer number (3020772468).

Almost surely, 2^11220012011 is an apocalyptic number.

11220012011 is a deficient number, since it is larger than the sum of its proper divisors (863077861).

11220012011 is an equidigital number, since it uses as much as digits as its factorization.

11220012011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863077860.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11220012011 its reverse (11021002211), we get a palindrome (22241014222).

The spelling of 11220012011 in words is "eleven billion, two hundred twenty million, twelve thousand, eleven".