1212200205 has 8 divisors (see below), whose sum is σ = 1939520352. Its totient is φ = 646506768.

The previous prime is 1212200201. The next prime is 1212200237. The reversal of 1212200205 is 5020022121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1212200205 - 2² = 1212200201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 80813347 = 1212200205 / (1 + 2 + 1 + 2 + 2 + 0 + 0 + 2 + 0 + 5).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212200201) 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 7 ways as a sum of consecutive naturals, for example, 40406659 + ... + 40406688.

It is an arithmetic number, because the mean of its divisors is an integer number (242440044).

Almost surely, 2^1212200205 is an apocalyptic number.

1212200205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1212200205 is a deficient number, since it is larger than the sum of its proper divisors (727320147).

1212200205 is an equidigital number, since it uses as much as digits as its factorization.

1212200205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80813355.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1212200205 is about 34816.6656215095. The cubic root of 1212200205 is about 1066.2477253989.

Adding to 1212200205 its reverse (5020022121), we get a palindrome (6232222326).

The spelling of 1212200205 in words is "one billion, two hundred twelve million, two hundred thousand, two hundred five".