2101111000321 has 4 divisors (see below), whose sum is σ = 2103670210644. Its totient is φ = 2098551790000.

The previous prime is 2101111000271. The next prime is 2101111000349. The reversal of 2101111000321 is 1230001111012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 324488590321 + 1776622410000 = 569639^2 + 1332900^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101111000321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101111000421) 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, 1279603930 + ... + 1279605571.

It is an arithmetic number, because the mean of its divisors is an integer number (525917552661).

Almost surely, 2^{2101111000321} is an apocalyptic number.

It is an amenable number.

2101111000321 is a deficient number, since it is larger than the sum of its proper divisors (2559210323).

2101111000321 is an equidigital number, since it uses as much as digits as its factorization.

2101111000321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2559210322.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 2101111000321 its reverse (1230001111012), we get a palindrome (3331112111333).

The spelling of 2101111000321 in words is "two trillion, one hundred one billion, one hundred eleven million, three hundred twenty-one", and thus it is an aban number.