121761607042500 has 120 divisors (see below), whose sum is σ = 355144018410720. Its totient is φ = 32458819680000.

The previous prime is 121761607042489. The next prime is 121761607042583. The reversal of 121761607042500 is 5240706167121.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 19533435 + ... + 25001565.

It is an arithmetic number, because the mean of its divisors is an integer number (2959533486756).

Almost surely, 2^{121761607042500} is an apocalyptic number.

121761607042500 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 121761607042500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177572009205360).

121761607042500 is an abundant number, since it is smaller than the sum of its proper divisors (233382411368220).

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

121761607042500 is a wasteful number, since it uses less digits than its factorization.

121761607042500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5471127 (or 5471110 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The spelling of 121761607042500 in words is "one hundred twenty-one trillion, seven hundred sixty-one billion, six hundred seven million, forty-two thousand, five hundred".