87121075000 has 96 divisors (see below), whose sum is σ = 211219293600. Its totient is φ = 33646480000.

The previous prime is 87121074983. The next prime is 87121075031. The reversal of 87121075000 is 57012178.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 664917 + ... + 785083.

It is an arithmetic number, because the mean of its divisors is an integer number (2200200975).

Almost surely, 2^87121075000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87121075000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105609646800).

87121075000 is an abundant number, since it is smaller than the sum of its proper divisors (124098218600).

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

87121075000 is a wasteful number, since it uses less digits than its factorization.

87121075000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120227 (or 120203 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 31.

Adding to 87121075000 its reverse (57012178), we get a palindrome (87178087178).

The spelling of 87121075000 in words is "eighty-seven billion, one hundred twenty-one million, seventy-five thousand".