4421206121 has 8 divisors (see below), whose sum is σ = 4762132320. Its totient is φ = 4091103072.

The previous prime is 4421206057. The next prime is 4421206147. The reversal of 4421206121 is 1216021244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4421206121 - 2⁶ = 4421206057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4421206151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2704940 + ... + 2706573.

It is an arithmetic number, because the mean of its divisors is an integer number (595266540).

Almost surely, 2^4421206121 is an apocalyptic number.

It is an amenable number.

4421206121 is a deficient number, since it is larger than the sum of its proper divisors (340926199).

4421206121 is a wasteful number, since it uses less digits than its factorization.

4421206121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5411575.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 4421206121 is about 66492.1508224843. The cubic root of 4421206121 is about 1641.2708423742.

Adding to 4421206121 its reverse (1216021244), we get a palindrome (5637227365).

The spelling of 4421206121 in words is "four billion, four hundred twenty-one million, two hundred six thousand, one hundred twenty-one".