1220050000 has 120 divisors (see below), whose sum is σ = 3183593112. Its totient is φ = 450240000.

The previous prime is 1220049979. The next prime is 1220050031. The reversal of 1220050000 is 500221.

It can be written as a sum of positive squares in 12 ways, for example, as 1209370176 + 10679824 = 34776^2 + 3268^2 .

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

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 23 ways as a sum of consecutive naturals, for example, 649062 + ... + 650938.

Almost surely, 2^1220050000 is an apocalyptic number.

1220050000 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 1220050000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1591796556).

1220050000 is an abundant number, since it is smaller than the sum of its proper divisors (1963543112).

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

1220050000 is an equidigital number, since it uses as much as digits as its factorization.

1220050000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1923 (or 1897 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 1220050000 is about 34929.2141337305. The cubic root of 1220050000 is about 1068.5443273501.

Adding to 1220050000 its reverse (500221), we get a palindrome (1220550221).

The spelling of 1220050000 in words is "one billion, two hundred twenty million, fifty thousand".