11022211221 has 32 divisors (see below), whose sum is σ = 17472153600. Its totient is φ = 6047186880.

The previous prime is 11022211217. The next prime is 11022211223. The reversal of 11022211221 is 12211222011.

It is not a de Polignac number, because 11022211221 - 2² = 11022211217 is a prime.

It is a super-3 number, since 3×11022211221³ (a number of 31 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11022211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11022211223) 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, 58456 + ... + 159566.

It is an arithmetic number, because the mean of its divisors is an integer number (546004800).

Almost surely, 2^11022211221 is an apocalyptic number.

It is an amenable number.

11022211221 is a deficient number, since it is larger than the sum of its proper divisors (6449942379).

11022211221 is a wasteful number, since it uses less digits than its factorization.

11022211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101329.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11022211221 its reverse (12211222011), we get a palindrome (23233433232).

The spelling of 11022211221 in words is "eleven billion, twenty-two million, two hundred eleven thousand, two hundred twenty-one".