1220302100 has 18 divisors (see below), whose sum is σ = 2648055774. Its totient is φ = 488120800.

The previous prime is 1220302081. The next prime is 1220302129. The reversal of 1220302100 is 12030221.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 17322244 + 1202979856 = 4162^2 + 34684^2 .

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 5 ways as a sum of consecutive naturals, for example, 6101411 + ... + 6101610.

Almost surely, 2^1220302100 is an apocalyptic number.

1220302100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220302100 is an abundant number, since it is smaller than the sum of its proper divisors (1427753674).

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

1220302100 is a wasteful number, since it uses less digits than its factorization.

1220302100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12203035 (or 12203028 counting only the distinct ones).

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

The square root of 1220302100 is about 34932.8226743846. The cubic root of 1220302100 is about 1068.6179203649.

Adding to 1220302100 its reverse (12030221), we get a palindrome (1232332321).

The spelling of 1220302100 in words is "one billion, two hundred twenty million, three hundred two thousand, one hundred".