2101110102221 has 4 divisors (see below), whose sum is σ = 2262733956252. Its totient is φ = 1939486248192.

The previous prime is 2101110102131. The next prime is 2101110102227. The reversal of 2101110102221 is 1222010111012.

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 89850062500 + 2011260039721 = 299750^2 + 1418189^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101110102221 - 2¹⁰ = 2101110101197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101110102196 and 2101110102205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101110102227) 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, 80811926996 + ... + 80811927021.

It is an arithmetic number, because the mean of its divisors is an integer number (565683489063).

Almost surely, 2^{2101110102221} is an apocalyptic number.

It is an amenable number.

2101110102221 is a deficient number, since it is larger than the sum of its proper divisors (161623854031).

2101110102221 is a wasteful number, since it uses less digits than its factorization.

2101110102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161623854030.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2101110102221 its reverse (1222010111012), we get a palindrome (3323120213233).

The spelling of 2101110102221 in words is "two trillion, one hundred one billion, one hundred ten million, one hundred two thousand, two hundred twenty-one".