1010000100091 has 4 divisors (see below), whose sum is σ = 1020000101184. Its totient is φ = 1000000099000.

The previous prime is 1010000100071. The next prime is 1010000100101. The reversal of 1010000100091 is 1900010000101.

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

It is a cyclic number.

It is not a de Polignac number, because 1010000100091 - 2⁹ = 1010000099579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1010000100071) 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, 5000000395 + ... + 5000000596.

It is an arithmetic number, because the mean of its divisors is an integer number (255000025296).

Almost surely, 2^{1010000100091} is an apocalyptic number.

1010000100091 is a deficient number, since it is larger than the sum of its proper divisors (10000001093).

1010000100091 is a wasteful number, since it uses less digits than its factorization.

1010000100091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10000001092.

The product of its (nonzero) digits is 9, while the sum is 13.

Adding to 1010000100091 its reverse (1900010000101), we get a palindrome (2910010100192).

The spelling of 1010000100091 in words is "one trillion, ten billion, one hundred thousand, ninety-one".