20121211108 has 12 divisors (see below), whose sum is σ = 35325343872. Its totient is φ = 10028255720.

The previous prime is 20121211087. The next prime is 20121211139. The reversal of 20121211108 is 80111212102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8086060 + ... + 8088547.

It is an arithmetic number, because the mean of its divisors is an integer number (2943778656).

Almost surely, 2^20121211108 is an apocalyptic number.

It is an amenable number.

20121211108 is a deficient number, since it is larger than the sum of its proper divisors (15204132764).

20121211108 is a wasteful number, since it uses less digits than its factorization.

20121211108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16174922 (or 16174920 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

The spelling of 20121211108 in words is "twenty billion, one hundred twenty-one million, two hundred eleven thousand, one hundred eight".