2101110220021 has 8 divisors (see below), whose sum is σ = 2167851962880. Its totient is φ = 2035372112592.

The previous prime is 2101110220019. The next prime is 2101110220051. The reversal of 2101110220021 is 1200220111012.

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

It is a cyclic number.

It is not a de Polignac number, because 2101110220021 - 2¹ = 2101110220019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101110219983 and 2101110220010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101110220051) 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, 250904605 + ... + 250912978.

It is an arithmetic number, because the mean of its divisors is an integer number (270981495360).

Almost surely, 2^{2101110220021} is an apocalyptic number.

It is an amenable number.

2101110220021 is a deficient number, since it is larger than the sum of its proper divisors (66741742859).

2101110220021 is an equidigital number, since it uses as much as digits as its factorization.

2101110220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501817715.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2101110220021 its reverse (1200220111012), we get a palindrome (3301330331033).

The spelling of 2101110220021 in words is "two trillion, one hundred one billion, one hundred ten million, two hundred twenty thousand, twenty-one".