121808388306 has 16 divisors (see below), whose sum is σ = 265763756448. Its totient is φ = 36911632800.

The previous prime is 121808388077. The next prime is 121808388343. The reversal of 121808388306 is 603883808121.

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, 922790755 + ... + 922790886.

It is an arithmetic number, because the mean of its divisors is an integer number (16610234778).

Almost surely, 2^121808388306 is an apocalyptic number.

121808388306 is an abundant number, since it is smaller than the sum of its proper divisors (143955368142).

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

121808388306 is a wasteful number, since it uses less digits than its factorization.

121808388306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1845581657.

The product of its (nonzero) digits is 442368, while the sum is 48.

The spelling of 121808388306 in words is "one hundred twenty-one billion, eight hundred eight million, three hundred eighty-eight thousand, three hundred six".