4221123123 has 16 divisors (see below), whose sum is σ = 6433107200. Its totient is φ = 2411725536.

The previous prime is 4221123113. The next prime is 4221123161. The reversal of 4221123123 is 3213211224.

It is not a de Polignac number, because 4221123123 - 2⁴ = 4221123107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 4221123123.

It is not an unprimeable number, because it can be changed into a prime (4221123113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244428 + ... + 261126.

It is an arithmetic number, because the mean of its divisors is an integer number (402069200).

Almost surely, 2^4221123123 is an apocalyptic number.

4221123123 is a deficient number, since it is larger than the sum of its proper divisors (2211984077).

4221123123 is a wasteful number, since it uses less digits than its factorization.

4221123123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28746.

The product of its digits is 576, while the sum is 21.

The square root of 4221123123 is about 64970.1710248634. The cubic root of 4221123123 is about 1616.1289378288.

Adding to 4221123123 its reverse (3213211224), we get a palindrome (7434334347).

The spelling of 4221123123 in words is "four billion, two hundred twenty-one million, one hundred twenty-three thousand, one hundred twenty-three".