121988650474900 has 144 divisors (see below), whose sum is σ = 293554101335040. Its totient is φ = 43631441920000.

The previous prime is 121988650474877. The next prime is 121988650474909. The reversal of 121988650474900 is 9474056889121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121988650474909) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15436980 + ... + 21960820.

It is an arithmetic number, because the mean of its divisors is an integer number (2038570148160).

Almost surely, 2^{121988650474900} is an apocalyptic number.

121988650474900 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 121988650474900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146777050667520).

121988650474900 is an abundant number, since it is smaller than the sum of its proper divisors (171565450860140).

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

121988650474900 is a wasteful number, since it uses less digits than its factorization.

121988650474900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6524146 (or 6524139 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 64.

The spelling of 121988650474900 in words is "one hundred twenty-one trillion, nine hundred eighty-eight billion, six hundred fifty million, four hundred seventy-four thousand, nine hundred".