1216104212 has 12 divisors (see below), whose sum is σ = 2201568180. Its totient is φ = 587084736.

The previous prime is 1216104193. The next prime is 1216104251. The reversal of 1216104212 is 2124016121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 685078276 + 531025936 = 26174^2 + 23044^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5241713 + ... + 5241944.

It is an arithmetic number, because the mean of its divisors is an integer number (183464015).

Almost surely, 2^1216104212 is an apocalyptic number.

It is an amenable number.

1216104212 is a deficient number, since it is larger than the sum of its proper divisors (985463968).

1216104212 is a wasteful number, since it uses less digits than its factorization.

1216104212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10483690 (or 10483688 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 1216104212 is about 34872.6857583410. The cubic root of 1216104212 is about 1067.3911497880.

The spelling of 1216104212 in words is "one billion, two hundred sixteen million, one hundred four thousand, two hundred twelve".