1220030100 has 108 divisors (see below), whose sum is σ = 3965829504. Its totient is φ = 325334880.

The previous prime is 1220030083. The next prime is 1220030111. The reversal of 1220030100 is 10300221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (108).

It is a Harshad number since it is a multiple of its sum of digits (9).

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 35 ways as a sum of consecutive naturals, for example, 804 + ... + 49403.

Almost surely, 2^1220030100 is an apocalyptic number.

1220030100 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 1220030100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1982914752).

1220030100 is an abundant number, since it is smaller than the sum of its proper divisors (2745799404).

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

1220030100 is a wasteful number, since it uses less digits than its factorization.

1220030100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50236 (or 50217 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1220030100 is about 34928.9292707349. The cubic root of 1220030100 is about 1068.5385177118.

Adding to 1220030100 its reverse (10300221), we get a palindrome (1230330321).

The spelling of 1220030100 in words is "one billion, two hundred twenty million, thirty thousand, one hundred".