4221230121 has 12 divisors (see below), whose sum is σ = 6109558000. Its totient is φ = 2808510840.

The previous prime is 4221230119. The next prime is 4221230141. The reversal of 4221230121 is 1210321224.

It is a happy number.

4221230121 is a `hidden beast` number, since 422 + 1 + 230 + 12 + 1 = 666.

It is not a de Polignac number, because 4221230121 - 2¹ = 4221230119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4221230094 and 4221230103.

It is not an unprimeable number, because it can be changed into a prime (4221230141) 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 11 ways as a sum of consecutive naturals, for example, 465475 + ... + 474456.

Almost surely, 2^4221230121 is an apocalyptic number.

It is an amenable number.

4221230121 is a deficient number, since it is larger than the sum of its proper divisors (1888327879).

4221230121 is a wasteful number, since it uses less digits than its factorization.

4221230121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940436 (or 940433 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 4221230121 is about 64970.9944590661. The cubic root of 4221230121 is about 1616.1425930495.

Adding to 4221230121 its reverse (1210321224), we get a palindrome (5431551345).

The spelling of 4221230121 in words is "four billion, two hundred twenty-one million, two hundred thirty thousand, one hundred twenty-one".