2121110223 has 4 divisors (see below), whose sum is σ = 2828146968. Its totient is φ = 1414073480.

The previous prime is 2121110219. The next prime is 2121110237. The reversal of 2121110223 is 3220111212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2121110223 - 2² = 2121110219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121110293) 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, 353518368 + ... + 353518373.

It is an arithmetic number, because the mean of its divisors is an integer number (707036742).

Almost surely, 2^2121110223 is an apocalyptic number.

2121110223 is a deficient number, since it is larger than the sum of its proper divisors (707036745).

2121110223 is an equidigital number, since it uses as much as digits as its factorization.

2121110223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707036744.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 2121110223 is about 46055.5124062256. The cubic root of 2121110223 is about 1284.8558682028.

Adding to 2121110223 its reverse (3220111212), we get a palindrome (5341221435).

The spelling of 2121110223 in words is "two billion, one hundred twenty-one million, one hundred ten thousand, two hundred twenty-three".