1001010120091 has 4 divisors (see below), whose sum is σ = 1001191107384. Its totient is φ = 1000829132800.

The previous prime is 1001010120073. The next prime is 1001010120107. The reversal of 1001010120091 is 1900210101001.

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 1001010120091 - 2¹⁵ = 1001010087323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001010120001) 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, 90485350 + ... + 90496411.

It is an arithmetic number, because the mean of its divisors is an integer number (250297776846).

Almost surely, 2^{1001010120091} is an apocalyptic number.

1001010120091 is a deficient number, since it is larger than the sum of its proper divisors (180987293).

1001010120091 is an equidigital number, since it uses as much as digits as its factorization.

1001010120091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180987292.

The product of its (nonzero) digits is 18, while the sum is 16.

Adding to 1001010120091 its reverse (1900210101001), we get a palindrome (2901220221092).

The spelling of 1001010120091 in words is "one trillion, one billion, ten million, one hundred twenty thousand, ninety-one".