4101221 has 4 divisors (see below), whose sum is σ = 4105932. Its totient is φ = 4096512.

The previous prime is 4101197. The next prime is 4101241. The reversal of 4101221 is 1221014.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1809025 + 2292196 = 1345^2 + 1514^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4101221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4101241) 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, 626 + ... + 2931.

It is an arithmetic number, because the mean of its divisors is an integer number (1026483).

Almost surely, 2^4101221 is an apocalyptic number.

It is an amenable number.

4101221 is a deficient number, since it is larger than the sum of its proper divisors (4711).

4101221 is a wasteful number, since it uses less digits than its factorization.

4101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4710.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 4101221 is about 2025.1471551470. The cubic root of 4101221 is about 160.0679529068.

Adding to 4101221 its reverse (1221014), we get a palindrome (5322235).

The spelling of 4101221 in words is "four million, one hundred one thousand, two hundred twenty-one".