87121236236 has 6 divisors (see below), whose sum is σ = 152462163420. Its totient is φ = 43560618116.

The previous prime is 87121236221. The next prime is 87121236247. The reversal of 87121236236 is 63263212178.

It is a junction number, because it is equal to n+sod(n) for n = 87121236193 and 87121236202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10890154526 + ... + 10890154533.

It is an arithmetic number, because the mean of its divisors is an integer number (25410360570).

Almost surely, 2^87121236236 is an apocalyptic number.

It is an amenable number.

87121236236 is a deficient number, since it is larger than the sum of its proper divisors (65340927184).

87121236236 is a wasteful number, since it uses less digits than its factorization.

87121236236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21780309063 (or 21780309061 counting only the distinct ones).

The product of its digits is 145152, while the sum is 41.

The spelling of 87121236236 in words is "eighty-seven billion, one hundred twenty-one million, two hundred thirty-six thousand, two hundred thirty-six".