2101001311 has 4 divisors (see below), whose sum is σ = 2103554992. Its totient is φ = 2098447632.

The previous prime is 2101001299. The next prime is 2101001333. The reversal of 2101001311 is 1131001012.

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 2101001311 - 2⁹ = 2101000799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101001381) 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, 1275606 + ... + 1277251.

It is an arithmetic number, because the mean of its divisors is an integer number (525888748).

Almost surely, 2^2101001311 is an apocalyptic number.

2101001311 is a deficient number, since it is larger than the sum of its proper divisors (2553681).

2101001311 is an equidigital number, since it uses as much as digits as its factorization.

2101001311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2553680.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 2101001311 is about 45836.6808462393. The cubic root of 2101001311 is about 1280.7826656634.

Adding to 2101001311 its reverse (1131001012), we get a palindrome (3232002323).

The spelling of 2101001311 in words is "two billion, one hundred one million, one thousand, three hundred eleven".