1211664108 has 12 divisors (see below), whose sum is σ = 2827216280. Its totient is φ = 403888032.

The previous prime is 1211664101. The next prime is 1211664121. The reversal of 1211664108 is 8014661121.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1211664101) by changing a digit.

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, 50485993 + ... + 50486016.

Almost surely, 2^1211664108 is an apocalyptic number.

It is an amenable number.

1211664108 is an abundant number, since it is smaller than the sum of its proper divisors (1615552172).

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

1211664108 is a wasteful number, since it uses less digits than its factorization.

1211664108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100972016 (or 100972014 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 1211664108 is about 34808.9659139711. The cubic root of 1211664108 is about 1066.0905191084.

The spelling of 1211664108 in words is "one billion, two hundred eleven million, six hundred sixty-four thousand, one hundred eight".