121925502720 has 864 divisors, whose sum is σ = 517478008320. Its totient is φ = 26893762560.

The previous prime is 121925502719. The next prime is 121925502731. The reversal of 121925502720 is 27205529121.

121925502720 is a `hidden beast` number, since 12 + 1 + 92 + 550 + 2 + 7 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (864).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 63140155 + ... + 63142085.

It is an arithmetic number, because the mean of its divisors is an integer number (598932880).

Almost surely, 2^121925502720 is an apocalyptic number.

121925502720 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 121925502720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258739004160).

121925502720 is an abundant number, since it is smaller than the sum of its proper divisors (395552505600).

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

121925502720 is an equidigital number, since it uses as much as digits as its factorization.

121925502720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2003 (or 1977 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 121925502720 in words is "one hundred twenty-one billion, nine hundred twenty-five million, five hundred two thousand, seven hundred twenty".