121350086550 has 384 divisors, whose sum is σ = 418108953600. Its totient is φ = 25142400000.

The previous prime is 121350086513. The next prime is 121350086573. The reversal of 121350086550 is 55680053121.

It is a happy number.

121350086550 is a `hidden beast` number, since 1 + 21 + 3 + 5 + 0 + 0 + 86 + 550 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 40435050 + ... + 40438050.

It is an arithmetic number, because the mean of its divisors is an integer number (1088825400).

Almost surely, 2^121350086550 is an apocalyptic number.

121350086550 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 121350086550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209054476800).

121350086550 is an abundant number, since it is smaller than the sum of its proper divisors (296758867050).

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

121350086550 is a wasteful number, since it uses less digits than its factorization.

121350086550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3429 (or 3418 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The spelling of 121350086550 in words is "one hundred twenty-one billion, three hundred fifty million, eighty-six thousand, five hundred fifty".