1213302100 has 18 divisors (see below), whose sum is σ = 2632865774. Its totient is φ = 485320800.

The previous prime is 1213302059. The next prime is 1213302109. The reversal of 1213302100 is 12033121.

It can be written as a sum of positive squares in 3 ways, for example, as 71673156 + 1141628944 = 8466^2 + 33788^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213302109) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 6066411 + ... + 6066610.

Almost surely, 2^1213302100 is an apocalyptic number.

1213302100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213302100 is an abundant number, since it is smaller than the sum of its proper divisors (1419563674).

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

1213302100 is a wasteful number, since it uses less digits than its factorization.

1213302100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12133035 (or 12133028 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1213302100 is about 34832.4862735924. The cubic root of 1213302100 is about 1066.5707020871.

Adding to 1213302100 its reverse (12033121), we get a palindrome (1225335221).

The spelling of 1213302100 in words is "one billion, two hundred thirteen million, three hundred two thousand, one hundred".