1001010100091 has 4 divisors (see below), whose sum is σ = 1001415862632. Its totient is φ = 1000604337552.

The previous prime is 1001010100081. The next prime is 1001010100157. The reversal of 1001010100091 is 1900010101001.

It is a happy number.

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 1001010100091 - 2²⁶ = 1000942991227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001010100001) 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, 202877570 + ... + 202882503.

It is an arithmetic number, because the mean of its divisors is an integer number (250353965658).

Almost surely, 2^{1001010100091} is an apocalyptic number.

1001010100091 is a deficient number, since it is larger than the sum of its proper divisors (405762541).

1001010100091 is an equidigital number, since it uses as much as digits as its factorization.

1001010100091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405762540.

The product of its (nonzero) digits is 9, while the sum is 14.

Adding to 1001010100091 its reverse (1900010101001), we get a palindrome (2901020201092).

The spelling of 1001010100091 in words is "one trillion, one billion, ten million, one hundred thousand, ninety-one".