1213308900 has 216 divisors, whose sum is σ = 3941185248. Its totient is φ = 312000000.

The previous prime is 1213308809. The next prime is 1213308917. The reversal of 1213308900 is 98033121.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4833775 + ... + 4834025.

It is an arithmetic number, because the mean of its divisors is an integer number (18246228).

Almost surely, 2^1213308900 is an apocalyptic number.

1213308900 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 1213308900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1970592624).

1213308900 is an abundant number, since it is smaller than the sum of its proper divisors (2727876348).

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

1213308900 is a wasteful number, since it uses less digits than its factorization.

1213308900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1213308900 is about 34832.5838834847. The cubic root of 1213308900 is about 1066.5726946294.

The spelling of 1213308900 in words is "one billion, two hundred thirteen million, three hundred eight thousand, nine hundred".