121581930108 has 24 divisors (see below), whose sum is σ = 283696949200. Its totient is φ = 40526484480.

The previous prime is 121581930103. The next prime is 121581930163. The reversal of 121581930108 is 801039185121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121581930101) 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 7 ways as a sum of consecutive naturals, for example, 902418 + ... + 1028358.

Almost surely, 2^121581930108 is an apocalyptic number.

It is an amenable number.

121581930108 is an abundant number, since it is smaller than the sum of its proper divisors (162115019092).

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

121581930108 is a wasteful number, since it uses less digits than its factorization.

121581930108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206397 (or 206395 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 39.

The spelling of 121581930108 in words is "one hundred twenty-one billion, five hundred eighty-one million, nine hundred thirty thousand, one hundred eight".