11221122011 has 16 divisors (see below), whose sum is σ = 13077836160. Its totient is φ = 9519871680.

The previous prime is 11221122007. The next prime is 11221122013. The reversal of 11221122011 is 11022112211.

It is not a de Polignac number, because 11221122011 - 2² = 11221122007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11221122013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 386666 + ... + 414671.

It is an arithmetic number, because the mean of its divisors is an integer number (817364760).

Almost surely, 2^11221122011 is an apocalyptic number.

11221122011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11221122011 is a deficient number, since it is larger than the sum of its proper divisors (1856714149).

11221122011 is a wasteful number, since it uses less digits than its factorization.

11221122011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801434.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11221122011 its reverse (11022112211), we get a palindrome (22243234222).

The spelling of 11221122011 in words is "eleven billion, two hundred twenty-one million, one hundred twenty-two thousand, eleven".