2110221001001 has 4 divisors (see below), whose sum is σ = 2119435940100. Its totient is φ = 2101006061904.

The previous prime is 2110221000997. The next prime is 2110221001019. The reversal of 2110221001001 is 1001001220112.

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 963736853401 + 1146484147600 = 981701^2 + 1070740^2 .

It is a cyclic number.

It is not a de Polignac number, because 2110221001001 - 2² = 2110221000997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2110221001081) 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, 4607469206 + ... + 4607469663.

It is an arithmetic number, because the mean of its divisors is an integer number (529858985025).

Almost surely, 2^{2110221001001} is an apocalyptic number.

It is an amenable number.

2110221001001 is a deficient number, since it is larger than the sum of its proper divisors (9214939099).

2110221001001 is an equidigital number, since it uses as much as digits as its factorization.

2110221001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9214939098.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2110221001001 its reverse (1001001220112), we get a palindrome (3111222221113).

The spelling of 2110221001001 in words is "two trillion, one hundred ten billion, two hundred twenty-one million, one thousand, one".