98000091000021 has 16 divisors (see below), whose sum is σ = 149333717333504.
Its totient is φ = 55999959999984.
The previous prime is 98000091000017. The next prime is 98000091000029. The reversal of 98000091000021 is 12000019000089.
98000091000021 is a nontrivial binomial coefficient, being equal to C(14000007, 2).
It is not a de Polignac number, because 98000091000021 - 22 = 98000091000017 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (98000091000029) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (23) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10500006 + ... + 17500008.
It is an arithmetic number, because the mean of its divisors is an integer number (9333357333344).
Almost surely, 298000091000021 is an apocalyptic number.
98000091000021 is the 14000006-th triangular number.
It is an amenable number.
98000091000021 is a deficient number, since it is larger than the sum of its proper divisors (51333626333483).
98000091000021 is a wasteful number, since it uses less digits than its factorization.
98000091000021 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 7666680.
The product of its (nonzero) digits is 1296, while the sum is 30.
The spelling of 98000091000021 in words is "ninety-eight trillion, ninety-one million, twenty-one", and thus it is an aban number and an uban number.