2121102223 has 4 divisors (see below), whose sum is σ = 2245872960. Its totient is φ = 1996331488.

The previous prime is 2121102197. The next prime is 2121102227. The reversal of 2121102223 is 3222011212.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-2121102223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121102197 and 2121102206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121102227) 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, 62385343 + ... + 62385376.

It is an arithmetic number, because the mean of its divisors is an integer number (561468240).

Almost surely, 2^2121102223 is an apocalyptic number.

2121102223 is a deficient number, since it is larger than the sum of its proper divisors (124770737).

2121102223 is a wasteful number, since it uses less digits than its factorization.

2121102223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124770736.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2121102223 is about 46055.4255544339. The cubic root of 2121102223 is about 1284.8542528758.

Adding to 2121102223 its reverse (3222011212), we get a palindrome (5343113435).

The spelling of 2121102223 in words is "two billion, one hundred twenty-one million, one hundred two thousand, two hundred twenty-three".