1122220000 has 120 divisors (see below), whose sum is σ = 3012404472. Its totient is φ = 408000000.

The previous prime is 1122219991. The next prime is 1122220013. The reversal of 1122220000 is 222211.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 217450 + ... + 222550.

Almost surely, 2^1122220000 is an apocalyptic number.

1122220000 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 1122220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1506202236).

1122220000 is an abundant number, since it is smaller than the sum of its proper divisors (1890184472).

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

1122220000 is an equidigital number, since it uses as much as digits as its factorization.

1122220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5142 (or 5119 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1122220000 is about 33499.5522358135. The cubic root of 1122220000 is about 1039.1845185253.

Adding to 1122220000 its reverse (222211), we get a palindrome (1122442211).

It can be divided in two parts, 1122 and 220000, that added together give a palindrome (221122).

The spelling of 1122220000 in words is "one billion, one hundred twenty-two million, two hundred twenty thousand".