101009100091 has 4 divisors (see below), whose sum is σ = 101243460384. Its totient is φ = 100774739800.

The previous prime is 101009100011. The next prime is 101009100167. The reversal of 101009100091 is 190001900101.

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 101009100091 - 2⁹ = 101009099579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101009100001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117179500 + ... + 117180361.

It is an arithmetic number, because the mean of its divisors is an integer number (25310865096).

Almost surely, 2^101009100091 is an apocalyptic number.

101009100091 is a deficient number, since it is larger than the sum of its proper divisors (234360293).

101009100091 is an equidigital number, since it uses as much as digits as its factorization.

101009100091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234360292.

The product of its (nonzero) digits is 81, while the sum is 22.

The spelling of 101009100091 in words is "one hundred one billion, nine million, one hundred thousand, ninety-one".