9891001102001 has 4 divisors (see below), whose sum is σ = 9898734489600. Its totient is φ = 9883267714404.

The previous prime is 9891001101991. The next prime is 9891001102043. The reversal of 9891001102001 is 1002011001989.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9891001102001 - 2¹⁸ = 9891000839857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9891001102061) 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, 3866691881 + ... + 3866694438.

It is an arithmetic number, because the mean of its divisors is an integer number (2474683622400).

Almost surely, 2^{9891001102001} is an apocalyptic number.

It is an amenable number.

9891001102001 is a deficient number, since it is larger than the sum of its proper divisors (7733387599).

9891001102001 is a wasteful number, since it uses less digits than its factorization.

9891001102001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7733387598.

The product of its (nonzero) digits is 1296, while the sum is 32.

The spelling of 9891001102001 in words is "nine trillion, eight hundred ninety-one billion, one million, one hundred two thousand, one".