2110112110021 has 4 divisors (see below), whose sum is σ = 2131865843212. Its totient is φ = 2088358376832.

The previous prime is 2110112109977. The next prime is 2110112110031. The reversal of 2110112110021 is 1200112110112.

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 1326021340900 + 784090769121 = 1151530^2 + 885489^2 .

It is a cyclic number.

It is not a de Polignac number, because 2110112110021 - 2⁹ = 2110112109509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2110112109983 and 2110112110010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2110112110031) 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, 10876866450 + ... + 10876866643.

It is an arithmetic number, because the mean of its divisors is an integer number (532966460803).

Almost surely, 2^{2110112110021} is an apocalyptic number.

It is an amenable number.

2110112110021 is a deficient number, since it is larger than the sum of its proper divisors (21753733191).

2110112110021 is an equidigital number, since it uses as much as digits as its factorization.

2110112110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21753733190.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2110112110021 its reverse (1200112110112), we get a palindrome (3310224220133).

Subtracting from 2110112110021 its reverse (1200112110112), we obtain a palindrome (909999999909).

The spelling of 2110112110021 in words is "two trillion, one hundred ten billion, one hundred twelve million, one hundred ten thousand, twenty-one".