11221001211 has 64 divisors (see below), whose sum is σ = 18211905536. Its totient is φ = 6009292800.

The previous prime is 11221001203. The next prime is 11221001219. The reversal of 11221001211 is 11210012211.

It is an interprime number because it is at equal distance from previous prime (11221001203) and next prime (11221001219).

It is not a de Polignac number, because 11221001211 - 2³ = 11221001203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11221001219) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5804001 + ... + 5805933.

It is an arithmetic number, because the mean of its divisors is an integer number (284561024).

Almost surely, 2^11221001211 is an apocalyptic number.

11221001211 is a deficient number, since it is larger than the sum of its proper divisors (6990904325).

11221001211 is a wasteful number, since it uses less digits than its factorization.

11221001211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2252.

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

Adding to 11221001211 its reverse (11210012211), we get a palindrome (22431013422).

The spelling of 11221001211 in words is "eleven billion, two hundred twenty-one million, one thousand, two hundred eleven".