2001211120191 has 8 divisors (see below), whose sum is σ = 2669457475120. Its totient is φ = 1333552756032.

The previous prime is 2001211120177. The next prime is 2001211120211. The reversal of 2001211120191 is 1910211121002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2001211120191 - 2¹⁸ = 2001210858047 is a prime.

It is a super-2 number, since 2×2001211120191² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001211120291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146989750 + ... + 147003363.

It is an arithmetic number, because the mean of its divisors is an integer number (333682184390).

Almost surely, 2^{2001211120191} is an apocalyptic number.

2001211120191 is a deficient number, since it is larger than the sum of its proper divisors (668246354929).

2001211120191 is a wasteful number, since it uses less digits than its factorization.

2001211120191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293995385.

The product of its (nonzero) digits is 72, while the sum is 21.

Adding to 2001211120191 its reverse (1910211121002), we get a palindrome (3911422241193).

The spelling of 2001211120191 in words is "two trillion, one billion, two hundred eleven million, one hundred twenty thousand, one hundred ninety-one".