8921087999999 has 4 divisors (see below), whose sum is σ = 10195529142864. Its totient is φ = 7646646857136.

The previous prime is 8921087999983. The next prime is 8921088000073. The reversal of 8921087999999 is 9999997801298.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 8921087999999 - 2⁴ = 8921087999983 is a prime.

It is a super-2 number, since 2×8921087999999² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8921087999909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637220571422 + ... + 637220571435.

It is an arithmetic number, because the mean of its divisors is an integer number (2548882285716).

Almost surely, 2^{8921087999999} is an apocalyptic number.

8921087999999 is a deficient number, since it is larger than the sum of its proper divisors (1274441142865).

8921087999999 is a wasteful number, since it uses less digits than its factorization.

8921087999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274441142864.

The product of its (nonzero) digits is 4285540224, while the sum is 89.

The spelling of 8921087999999 in words is "eight trillion, nine hundred twenty-one billion, eighty-seven million, nine hundred ninety-nine thousand, nine hundred ninety-nine".