11001221022 has 48 divisors (see below), whose sum is σ = 24215271696. Its totient is φ = 3329462400.

The previous prime is 11001221009. The next prime is 11001221039. The reversal of 11001221022 is 22012210011.

It is a junction number, because it is equal to n+sod(n) for n = 11001220989 and 11001221007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 586818 + ... + 605274.

It is an arithmetic number, because the mean of its divisors is an integer number (504484827).

Almost surely, 2^11001221022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11001221022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12107635848).

11001221022 is an abundant number, since it is smaller than the sum of its proper divisors (13214050674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11001221022 is a wasteful number, since it uses less digits than its factorization.

11001221022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19305 (or 19294 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 11001221022 its reverse (22012210011), we get a palindrome (33013431033).

The spelling of 11001221022 in words is "eleven billion, one million, two hundred twenty-one thousand, twenty-two".