12121131208 has 32 divisors (see below), whose sum is σ = 22896014400. Its totient is φ = 6015632832.

The previous prime is 12121131199. The next prime is 12121131241. The reversal of 12121131208 is 80213112121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 981166 + ... + 993442.

It is an arithmetic number, because the mean of its divisors is an integer number (715500450).

Almost surely, 2^12121131208 is an apocalyptic number.

It is an amenable number.

12121131208 is a deficient number, since it is larger than the sum of its proper divisors (10774883192).

12121131208 is a wasteful number, since it uses less digits than its factorization.

12121131208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13189 (or 13185 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 22.

Adding to 12121131208 its reverse (80213112121), we get a palindrome (92334243329).

The spelling of 12121131208 in words is "twelve billion, one hundred twenty-one million, one hundred thirty-one thousand, two hundred eight".