1213304100 has 36 divisors (see below), whose sum is σ = 3510494064. Its totient is φ = 323547680.

The previous prime is 1213304087. The next prime is 1213304129. The reversal of 1213304100 is 14033121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1213304100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2021874 + ... + 2022473.

It is an arithmetic number, because the mean of its divisors is an integer number (97513724).

Almost surely, 2^1213304100 is an apocalyptic number.

1213304100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213304100 is an abundant number, since it is smaller than the sum of its proper divisors (2297189964).

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

1213304100 is a wasteful number, since it uses less digits than its factorization.

1213304100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4044364 (or 4044357 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1213304100 is about 34832.5149824126. The cubic root of 1213304100 is about 1066.5712881297.

Adding to 1213304100 its reverse (14033121), we get a palindrome (1227337221).

The spelling of 1213304100 in words is "one billion, two hundred thirteen million, three hundred four thousand, one hundred".