1212120205 has 8 divisors (see below), whose sum is σ = 1454824800. Its totient is φ = 969509136.

The previous prime is 1212120199. The next prime is 1212120223. The reversal of 1212120205 is 5020212121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1212120205 - 2¹¹ = 1212118157 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9286 + ... + 50104.

It is an arithmetic number, because the mean of its divisors is an integer number (181853100).

Almost surely, 2^1212120205 is an apocalyptic number.

It is an amenable number.

1212120205 is a deficient number, since it is larger than the sum of its proper divisors (242704595).

1212120205 is an equidigital number, since it uses as much as digits as its factorization.

1212120205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46763.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1212120205 is about 34815.5167274593. The cubic root of 1212120205 is about 1066.2242689616.

Adding to 1212120205 its reverse (5020212121), we get a palindrome (6232332326).

The spelling of 1212120205 in words is "one billion, two hundred twelve million, one hundred twenty thousand, two hundred five".