2001020010191 has 4 divisors (see below), whose sum is σ = 2118727069632. Its totient is φ = 1883312950752.

The previous prime is 2001020010169. The next prime is 2001020010371. The reversal of 2001020010191 is 1910100201002.

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 2001020010191 - 2³⁰ = 1999946268367 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 117707059423 = 2001020010191 / (2 + 0 + 0 + 1 + 0 + 2 + 0 + 0 + 1 + 0 + 1 + 9 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001020010491) 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, 58853529695 + ... + 58853529728.

It is an arithmetic number, because the mean of its divisors is an integer number (529681767408).

Almost surely, 2^{2001020010191} is an apocalyptic number.

2001020010191 is a deficient number, since it is larger than the sum of its proper divisors (117707059441).

2001020010191 is a wasteful number, since it uses less digits than its factorization.

2001020010191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117707059440.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 2001020010191 its reverse (1910100201002), we get a palindrome (3911120211193).

The spelling of 2001020010191 in words is "two trillion, one billion, twenty million, ten thousand, one hundred ninety-one".