4115331221 has 4 divisors (see below), whose sum is σ = 4115460672. Its totient is φ = 4115201772.

The previous prime is 4115331203. The next prime is 4115331223. The reversal of 4115331221 is 1221335114.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4115331221 - 2¹⁴ = 4115314837 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 (4115331223) 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, 19460 + ... + 92786.

It is an arithmetic number, because the mean of its divisors is an integer number (1028865168).

Almost surely, 2^4115331221 is an apocalyptic number.

It is an amenable number.

4115331221 is a deficient number, since it is larger than the sum of its proper divisors (129451).

4115331221 is an equidigital number, since it uses as much as digits as its factorization.

4115331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129450.

The product of its digits is 720, while the sum is 23.

The square root of 4115331221 is about 64150.8473911296. The cubic root of 4115331221 is about 1602.5131365913.

Adding to 4115331221 its reverse (1221335114), we get a palindrome (5336666335).

The spelling of 4115331221 in words is "four billion, one hundred fifteen million, three hundred thirty-one thousand, two hundred twenty-one".