1212200320 has 32 divisors (see below), whose sum is σ = 2897917920. Its totient is φ = 484879872.

The previous prime is 1212200299. The next prime is 1212200321. The reversal of 1212200320 is 230022121.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 1212200320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212200321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 946392 + ... + 947671.

It is an arithmetic number, because the mean of its divisors is an integer number (90559935).

Almost surely, 2^1212200320 is an apocalyptic number.

1212200320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212200320 is an abundant number, since it is smaller than the sum of its proper divisors (1685717600).

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

1212200320 is an equidigital number, since it uses as much as digits as its factorization.

1212200320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1894082 (or 1894070 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1212200320 is about 34816.6672730174. The cubic root of 1212200320 is about 1066.2477591168.

Adding to 1212200320 its reverse (230022121), we get a palindrome (1442222441).

The spelling of 1212200320 in words is "one billion, two hundred twelve million, two hundred thousand, three hundred twenty".