2110110122221 has 4 divisors (see below), whose sum is σ = 2117727848572. Its totient is φ = 2102492395872.

The previous prime is 2110110122213. The next prime is 2110110122231. The reversal of 2110110122221 is 1222210110112.

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 480366817225 + 1629743304996 = 693085^2 + 1276614^2 .

It is a cyclic number.

It is not a de Polignac number, because 2110110122221 - 2³ = 2110110122213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2110110122195 and 2110110122204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2110110122231) 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, 3808862760 + ... + 3808863313.

It is an arithmetic number, because the mean of its divisors is an integer number (529431962143).

Almost surely, 2^{2110110122221} is an apocalyptic number.

It is an amenable number.

2110110122221 is a deficient number, since it is larger than the sum of its proper divisors (7617726351).

2110110122221 is an equidigital number, since it uses as much as digits as its factorization.

2110110122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7617726350.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2110110122221 its reverse (1222210110112), we get a palindrome (3332320232333).

The spelling of 2110110122221 in words is "two trillion, one hundred ten billion, one hundred ten million, one hundred twenty-two thousand, two hundred twenty-one".