1110123210221 has 4 divisors (see below), whose sum is σ = 1110132291744. Its totient is φ = 1110114128700.

The previous prime is 1110123210173. The next prime is 1110123210223. The reversal of 1110123210221 is 1220123210111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1110123210221 - 2¹⁰ = 1110123209197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1110123210221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1110123210223) 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, 4354865 + ... + 4602726.

It is an arithmetic number, because the mean of its divisors is an integer number (277533072936).

Almost surely, 2^{1110123210221} is an apocalyptic number.

It is an amenable number.

1110123210221 is a deficient number, since it is larger than the sum of its proper divisors (9081523).

1110123210221 is an equidigital number, since it uses as much as digits as its factorization.

1110123210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9081522.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1110123210221 its reverse (1220123210111), we get a palindrome (2330246420332).

It can be divided in two parts, 111012 and 3210221, that added together give a palindrome (3321233).

The spelling of 1110123210221 in words is "one trillion, one hundred ten billion, one hundred twenty-three million, two hundred ten thousand, two hundred twenty-one".