30121131208 has 64 divisors (see below), whose sum is σ = 65193384960. Its totient is φ = 12780058176.

The previous prime is 30121131203. The next prime is 30121131221. The reversal of 30121131208 is 80213112103.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (30121131203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2394391 + ... + 2406937.

It is an arithmetic number, because the mean of its divisors is an integer number (1018646640).

Almost surely, 2^30121131208 is an apocalyptic number.

It is an amenable number.

30121131208 is an abundant number, since it is smaller than the sum of its proper divisors (35072253752).

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

30121131208 is a wasteful number, since it uses less digits than its factorization.

30121131208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12986 (or 12982 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 30121131208 in words is "thirty billion, one hundred twenty-one million, one hundred thirty-one thousand, two hundred eight".