9181920100001 has 4 divisors (see below), whose sum is σ = 10016640109104. Its totient is φ = 8347200090900.

The previous prime is 9181920099967. The next prime is 9181920100099. The reversal of 9181920100001 is 1000010291819.

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 de Polignac number, because none of the positive numbers 2^k-9181920100001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9181920102001) 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 3 ways as a sum of consecutive naturals, for example, 417360004535 + ... + 417360004556.

It is an arithmetic number, because the mean of its divisors is an integer number (2504160027276).

Almost surely, 2^{9181920100001} is an apocalyptic number.

It is an amenable number.

9181920100001 is a deficient number, since it is larger than the sum of its proper divisors (834720009103).

9181920100001 is a wasteful number, since it uses less digits than its factorization.

9181920100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834720009102.

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

The spelling of 9181920100001 in words is "nine trillion, one hundred eighty-one billion, nine hundred twenty million, one hundred thousand, one".