121541535000 has 240 divisors, whose sum is σ = 414120564000. Its totient is φ = 32191776000.

The previous prime is 121541534981. The next prime is 121541535023. The reversal of 121541535000 is 535145121.

121541535000 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 4 + 153 + 500 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 6695937 + ... + 6714063.

It is an arithmetic number, because the mean of its divisors is an integer number (1725502350).

Almost surely, 2^121541535000 is an apocalyptic number.

121541535000 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 121541535000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207060282000).

121541535000 is an abundant number, since it is smaller than the sum of its proper divisors (292579029000).

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

121541535000 is a wasteful number, since it uses less digits than its factorization.

121541535000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18308 (or 18286 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The spelling of 121541535000 in words is "one hundred twenty-one billion, five hundred forty-one million, five hundred thirty-five thousand".