1220120300 has 72 divisors (see below), whose sum is σ = 3034659936. Its totient is φ = 417116160.

The previous prime is 1220120273. The next prime is 1220120309. The reversal of 1220120300 is 30210221.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1220120309) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 258764 + ... + 263436.

Almost surely, 2^1220120300 is an apocalyptic number.

1220120300 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 1220120300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1517329968).

1220120300 is an abundant number, since it is smaller than the sum of its proper divisors (1814539636).

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

1220120300 is a wasteful number, since it uses less digits than its factorization.

1220120300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5067 (or 5060 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1220120300 is about 34930.2204401862. The cubic root of 1220120300 is about 1068.5648503406.

Adding to 1220120300 its reverse (30210221), we get a palindrome (1250330521).

The spelling of 1220120300 in words is "one billion, two hundred twenty million, one hundred twenty thousand, three hundred".