1122221000220 has 96 divisors (see below), whose sum is σ = 3163226820096. Its totient is φ = 297259372800.

The previous prime is 1122221000203. The next prime is 1122221000239. The reversal of 1122221000220 is 220001222211.

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 1122221000220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33056655 + ... + 33090585.

It is an arithmetic number, because the mean of its divisors is an integer number (32950279376).

Almost surely, 2^{1122221000220} is an apocalyptic number.

1122221000220 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 1122221000220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1581613410048).

1122221000220 is an abundant number, since it is smaller than the sum of its proper divisors (2041005819876).

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

1122221000220 is a wasteful number, since it uses less digits than its factorization.

1122221000220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37611 (or 37609 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1122221000220 its reverse (220001222211), we get a palindrome (1342222222431).

The spelling of 1122221000220 in words is "one trillion, one hundred twenty-two billion, two hundred twenty-one million, two hundred twenty", and thus it is an aban number.