10221111220 has 48 divisors (see below), whose sum is σ = 22522872960. Its totient is φ = 3888807296.

The previous prime is 10221111203. The next prime is 10221111227. The reversal of 10221111220 is 2211112201.

10221111220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×10221111220² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10221111220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221111227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20274 + ... + 144406.

It is an arithmetic number, because the mean of its divisors is an integer number (469226520).

Almost surely, 2^10221111220 is an apocalyptic number.

10221111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10221111220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11261436480).

10221111220 is an abundant number, since it is smaller than the sum of its proper divisors (12301761740).

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

10221111220 is a wasteful number, since it uses less digits than its factorization.

10221111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124344 (or 124342 counting only the distinct ones).

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

Adding to 10221111220 its reverse (2211112201), we get a palindrome (12432223421).

The spelling of 10221111220 in words is "ten billion, two hundred twenty-one million, one hundred eleven thousand, two hundred twenty".