4205222121 has 8 divisors (see below), whose sum is σ = 5615174880. Its totient is φ = 2799375392.

The previous prime is 4205222107. The next prime is 4205222129. The reversal of 4205222121 is 1212225024.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4205222121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4205222129) 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, 1024116 + ... + 1028213.

It is an arithmetic number, because the mean of its divisors is an integer number (701896860).

Almost surely, 2^4205222121 is an apocalyptic number.

It is an amenable number.

4205222121 is a deficient number, since it is larger than the sum of its proper divisors (1409952759).

4205222121 is a wasteful number, since it uses less digits than its factorization.

4205222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2053015.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 4205222121 is about 64847.6840064470. The cubic root of 4205222121 is about 1614.0970611066.

Adding to 4205222121 its reverse (1212225024), we get a palindrome (5417447145).

The spelling of 4205222121 in words is "four billion, two hundred five million, two hundred twenty-two thousand, one hundred twenty-one".