11001022222221 has 12 divisors (see below), whose sum is σ = 15891191971200. Its totient is φ = 7333633335240.

The previous prime is 11001022222187. The next prime is 11001022222241. The reversal of 11001022222221 is 12222222010011.

It is a happy number.

It is not a de Polignac number, because 11001022222221 - 2¹⁴ = 11001022205837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11001022222194 and 11001022222203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001022222241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31607271 + ... + 31953428.

It is an arithmetic number, because the mean of its divisors is an integer number (1324265997600).

Almost surely, 2^{11001022222221} is an apocalyptic number.

It is an amenable number.

11001022222221 is a deficient number, since it is larger than the sum of its proper divisors (4890169748979).

11001022222221 is a wasteful number, since it uses less digits than its factorization.

11001022222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63579936 (or 63579933 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 11001022222221 its reverse (12222222010011), we get a palindrome (23223244232232).

The spelling of 11001022222221 in words is "eleven trillion, one billion, twenty-two million, two hundred twenty-two thousand, two hundred twenty-one".