4166421121 has 4 divisors (see below), whose sum is σ = 4196833092. Its totient is φ = 4136009152.

The previous prime is 4166421101. The next prime is 4166421131. The reversal of 4166421121 is 1211246614.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1778730625 + 2387690496 = 42175^2 + 48864^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4166421121 is a prime.

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 4166421121.

It is not an unprimeable number, because it can be changed into a prime (4166421101) 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, 15205780 + ... + 15206053.

It is an arithmetic number, because the mean of its divisors is an integer number (1049208273).

Almost surely, 2^4166421121 is an apocalyptic number.

It is an amenable number.

4166421121 is a deficient number, since it is larger than the sum of its proper divisors (30411971).

4166421121 is a wasteful number, since it uses less digits than its factorization.

4166421121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30411970.

The product of its digits is 2304, while the sum is 28.

The square root of 4166421121 is about 64547.8204202125. The cubic root of 4166421121 is about 1609.1173641572.

Adding to 4166421121 its reverse (1211246614), we get a palindrome (5377667735).

The spelling of 4166421121 in words is "four billion, one hundred sixty-six million, four hundred twenty-one thousand, one hundred twenty-one".