1111021202220 has 384 divisors, whose sum is σ = 3338588897280. Its totient is φ = 275559874560.

The previous prime is 1111021202197. The next prime is 1111021202227. The reversal of 1111021202220 is 222021201111.

It is a super-2 number, since 2×1111021202220² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1111021202220.

It is not an unprimeable number, because it can be changed into a prime (1111021202227) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3094766401 + ... + 3094766759.

It is an arithmetic number, because the mean of its divisors is an integer number (8694241920).

Almost surely, 2^{1111021202220} is an apocalyptic number.

1111021202220 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 1111021202220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1669294448640).

1111021202220 is an abundant number, since it is smaller than the sum of its proper divisors (2227567695060).

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

1111021202220 is a wasteful number, since it uses less digits than its factorization.

1111021202220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865 (or 863 counting only the distinct ones).

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

Adding to 1111021202220 its reverse (222021201111), we get a palindrome (1333042403331).

The spelling of 1111021202220 in words is "one trillion, one hundred eleven billion, twenty-one million, two hundred two thousand, two hundred twenty".