1213203200 has 216 divisors, whose sum is σ = 3452070720. Its totient is φ = 417484800.

The previous prime is 1213203191. The next prime is 1213203209. The reversal of 1213203200 is 23023121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1213203191) and next prime (1213203209).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213203209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1337147 + ... + 1338053.

Almost surely, 2^1213203200 is an apocalyptic number.

1213203200 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 1213203200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1726035360).

1213203200 is an abundant number, since it is smaller than the sum of its proper divisors (2238867520).

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

1213203200 is a wasteful number, since it uses less digits than its factorization.

1213203200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963 (or 944 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1213203200 is about 34831.0665929139. The cubic root of 1213203200 is about 1066.5417214761.

Adding to 1213203200 its reverse (23023121), we get a palindrome (1236226321).

The spelling of 1213203200 in words is "one billion, two hundred thirteen million, two hundred three thousand, two hundred".