121879098544 has 160 divisors (see below), whose sum is σ = 291181363200. Its totient is φ = 48298844160.

The previous prime is 121879098527. The next prime is 121879098569. The reversal of 121879098544 is 445890978121.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9760497 + ... + 9772975.

It is an arithmetic number, because the mean of its divisors is an integer number (1819883520).

Almost surely, 2^121879098544 is an apocalyptic number.

121879098544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121879098544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145590681600).

121879098544 is an abundant number, since it is smaller than the sum of its proper divisors (169302264656).

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

121879098544 is a wasteful number, since it uses less digits than its factorization.

121879098544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12651 (or 12645 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 58.

The spelling of 121879098544 in words is "one hundred twenty-one billion, eight hundred seventy-nine million, ninety-eight thousand, five hundred forty-four".