8891012101989 has 32 divisors (see below), whose sum is σ = 12030604185600. Its totient is φ = 5840041600512.

The previous prime is 8891012101927. The next prime is 8891012101997. The reversal of 8891012101989 is 9891012101988.

It is not a de Polignac number, because 8891012101989 - 2¹¹ = 8891012099941 is a prime.

It is a super-2 number, since 2×8891012101989² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8891012101189) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 358597377 + ... + 358622169.

It is an arithmetic number, because the mean of its divisors is an integer number (375956380800).

Almost surely, 2^{8891012101989} is an apocalyptic number.

It is an amenable number.

8891012101989 is a deficient number, since it is larger than the sum of its proper divisors (3139592083611).

8891012101989 is a wasteful number, since it uses less digits than its factorization.

8891012101989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31389.

The product of its (nonzero) digits is 746496, while the sum is 57.

Subtracting 8891012101989 from its reverse (9891012101988), we obtain a palindrome (999999999999).

The spelling of 8891012101989 in words is "eight trillion, eight hundred ninety-one billion, twelve million, one hundred one thousand, nine hundred eighty-nine".