1212241205 has 16 divisors (see below), whose sum is σ = 1716132864. Its totient is φ = 804435840.

The previous prime is 1212241201. The next prime is 1212241213. The reversal of 1212241205 is 5021422121.

It is not a de Polignac number, because 1212241205 - 2² = 1212241201 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212241201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 557552 + ... + 559721.

It is an arithmetic number, because the mean of its divisors is an integer number (107258304).

Almost surely, 2^1212241205 is an apocalyptic number.

It is an amenable number.

1212241205 is a deficient number, since it is larger than the sum of its proper divisors (503891659).

1212241205 is a wasteful number, since it uses less digits than its factorization.

1212241205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117316.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1212241205 is about 34817.2544150167. The cubic root of 1212241205 is about 1066.2597464231.

Adding to 1212241205 its reverse (5021422121), we get a palindrome (6233663326).

The spelling of 1212241205 in words is "one billion, two hundred twelve million, two hundred forty-one thousand, two hundred five".