2121100223 has 16 divisors (see below), whose sum is σ = 2396684160. Its totient is φ = 1859474400.

The previous prime is 2121100213. The next prime is 2121100229. The reversal of 2121100223 is 3220011212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2121100223 - 2⁶ = 2121100159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121100198 and 2121100207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121100229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285668 + ... + 292998.

It is an arithmetic number, because the mean of its divisors is an integer number (149792760).

Almost surely, 2^2121100223 is an apocalyptic number.

2121100223 is a deficient number, since it is larger than the sum of its proper divisors (275583937).

2121100223 is a wasteful number, since it uses less digits than its factorization.

2121100223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8278.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2121100223 is about 46055.4038414603. The cubic root of 2121100223 is about 1284.8538490434.

Adding to 2121100223 its reverse (3220011212), we get a palindrome (5341111435).

The spelling of 2121100223 in words is "two billion, one hundred twenty-one million, one hundred thousand, two hundred twenty-three".