121581930109 has 8 divisors (see below), whose sum is σ = 121825383680. Its totient is φ = 121338590976.

The previous prime is 121581930103. The next prime is 121581930163. The reversal of 121581930109 is 901039185121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121581930109 - 2³ = 121581930101 is a prime.

It is a Duffinian number.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2283412 + ... + 2336050.

It is an arithmetic number, because the mean of its divisors is an integer number (15228172960).

Almost surely, 2^121581930109 is an apocalyptic number.

It is an amenable number.

121581930109 is a deficient number, since it is larger than the sum of its proper divisors (243453571).

121581930109 is an equidigital number, since it uses as much as digits as its factorization.

121581930109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57219.

The product of its (nonzero) digits is 19440, while the sum is 40.

The spelling of 121581930109 in words is "one hundred twenty-one billion, five hundred eighty-one million, nine hundred thirty thousand, one hundred nine".