4221434121 has 4 divisors (see below), whose sum is σ = 5628578832. Its totient is φ = 2814289412.

The previous prime is 4221434089. The next prime is 4221434197. The reversal of 4221434121 is 1214341224.

4221434121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4221434121 - 2⁵ = 4221434089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4221434091 and 4221434100.

It is not an unprimeable number, because it can be changed into a prime (4221434621) 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, 703572351 + ... + 703572356.

It is an arithmetic number, because the mean of its divisors is an integer number (1407144708).

Almost surely, 2^4221434121 is an apocalyptic number.

It is an amenable number.

4221434121 is a deficient number, since it is larger than the sum of its proper divisors (1407144711).

4221434121 is a wasteful number, since it uses less digits than its factorization.

4221434121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407144710.

The product of its digits is 1536, while the sum is 24.

The square root of 4221434121 is about 64972.5643714330. The cubic root of 4221434121 is about 1616.1686271492.

Adding to 4221434121 its reverse (1214341224), we get a palindrome (5435775345).

The spelling of 4221434121 in words is "four billion, two hundred twenty-one million, four hundred thirty-four thousand, one hundred twenty-one".