987240123122 has 54 divisors (see below), whose sum is σ = 1702182826029. Its totient is φ = 429080268320.

The previous prime is 987240123071. The next prime is 987240123169. The reversal of 987240123122 is 221321042789.

It can be written as a sum of positive squares in 2 ways, for example, as 851358681481 + 135881441641 = 922691^2 + 368621^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=702581.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 987240123122.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 355504598 + ... + 355507374.

Almost surely, 2^987240123122 is an apocalyptic number.

987240123122 is a deficient number, since it is larger than the sum of its proper divisors (714942702907).

987240123122 is an equidigital number, since it uses as much as digits as its factorization.

987240123122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5624 (or 2813 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 987240123122 in words is "nine hundred eighty-seven billion, two hundred forty million, one hundred twenty-three thousand, one hundred twenty-two".