11122001221 has 8 divisors (see below), whose sum is σ = 11146800224. Its totient is φ = 11097226800.

The previous prime is 11122001201. The next prime is 11122001237. The reversal of 11122001221 is 12210022111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11122001221 - 2⁹ = 11122000709 is a prime.

It is a super-2 number, since 2×11122001221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11122001201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1118371 + ... + 1128271.

It is an arithmetic number, because the mean of its divisors is an integer number (1393350028).

Almost surely, 2^11122001221 is an apocalyptic number.

It is an amenable number.

11122001221 is a deficient number, since it is larger than the sum of its proper divisors (24799003).

11122001221 is an equidigital number, since it uses as much as digits as its factorization.

11122001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12291.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11122001221 its reverse (12210022111), we get a palindrome (23332023332).

The spelling of 11122001221 in words is "eleven billion, one hundred twenty-two million, one thousand, two hundred twenty-one".