11221112001 has 32 divisors (see below), whose sum is σ = 16832240640. Its totient is φ = 6591166400.

The previous prime is 11221111997. The next prime is 11221112009. The reversal of 11221112001 is 10021112211.

It is a cyclic number.

It is not a de Polignac number, because 11221112001 - 2² = 11221111997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11221112009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97651 + ... + 178823.

It is an arithmetic number, because the mean of its divisors is an integer number (526007520).

Almost surely, 2^11221112001 is an apocalyptic number.

11221112001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11221112001 is a deficient number, since it is larger than the sum of its proper divisors (5611128639).

11221112001 is a wasteful number, since it uses less digits than its factorization.

11221112001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81317.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11221112001 its reverse (10021112211), we get a palindrome (21242224212).

The spelling of 11221112001 in words is "eleven billion, two hundred twenty-one million, one hundred twelve thousand, one".