121543679250 has 768 divisors, whose sum is σ = 419747328000. Its totient is φ = 26233502400.

The previous prime is 121543679219. The next prime is 121543679261. The reversal of 121543679250 is 52976345121.

121543679250 is a `hidden beast` number, since 1 + 2 + 154 + 367 + 92 + 50 = 666.

121543679250 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 121543679196 and 121543679205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 395907597 + ... + 395907903.

It is an arithmetic number, because the mean of its divisors is an integer number (546546000).

Almost surely, 2^121543679250 is an apocalyptic number.

121543679250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121543679250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209873664000).

121543679250 is an abundant number, since it is smaller than the sum of its proper divisors (298203648750).

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

121543679250 is an equidigital number, since it uses as much as digits as its factorization.

121543679250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379 (or 343 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The spelling of 121543679250 in words is "one hundred twenty-one billion, five hundred forty-three million, six hundred seventy-nine thousand, two hundred fifty".