121666792490880 has 1536 divisors, whose sum is σ = 498321679564800. Its totient is φ = 25012035256320.

The previous prime is 121666792490833. The next prime is 121666792490897. The reversal of 121666792490880 is 88094297666121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 73161028929 + ... + 73161030591.

It is an arithmetic number, because the mean of its divisors is an integer number (324428176800).

Almost surely, 2^{121666792490880} is an apocalyptic number.

121666792490880 is a gapful number since it is divisible by the number (10) 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 121666792490880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249160839782400).

121666792490880 is an abundant number, since it is smaller than the sum of its proper divisors (376654887073920).

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

121666792490880 is a wasteful number, since it uses less digits than its factorization.

121666792490880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3212 (or 3193 counting only the distinct ones).

The product of its (nonzero) digits is 125411328, while the sum is 69.

The spelling of 121666792490880 in words is "one hundred twenty-one trillion, six hundred sixty-six billion, seven hundred ninety-two million, four hundred ninety thousand, eight hundred eighty".