1220120000 has 280 divisors, whose sum is σ = 3427902720. Its totient is φ = 426880000.

The previous prime is 1220119993. The next prime is 1220120021. The reversal of 1220120000 is 210221.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1220120000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 20679971 + ... + 20680029.

Almost surely, 2^1220120000 is an apocalyptic number.

1220120000 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 1220120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1713951360).

1220120000 is an abundant number, since it is smaller than the sum of its proper divisors (2207782720).

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

1220120000 is an equidigital number, since it uses as much as digits as its factorization.

1220120000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 1220120000 is about 34930.2161459101. The cubic root of 1220120000 is about 1068.5647627619.

Adding to 1220120000 its reverse (210221), we get a palindrome (1220330221).

The spelling of 1220120000 in words is "one billion, two hundred twenty million, one hundred twenty thousand".