121541139388016 has 20 divisors (see below), whose sum is σ = 236801521578600. Its totient is φ = 60431069303232.

The previous prime is 121541139388001. The next prime is 121541139388043. The reversal of 121541139388016 is 610883931145121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 21218771471 + ... + 21218777198.

It is an arithmetic number, because the mean of its divisors is an integer number (11840076078930).

Almost surely, 2^{121541139388016} is an apocalyptic number.

121541139388016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121541139388016 is a deficient number, since it is larger than the sum of its proper divisors (115260382190584).

121541139388016 is a wasteful number, since it uses less digits than its factorization.

121541139388016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42437548856 (or 42437548850 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 53.

The spelling of 121541139388016 in words is "one hundred twenty-one trillion, five hundred forty-one billion, one hundred thirty-nine million, three hundred eighty-eight thousand, sixteen".