4121340221 has 4 divisors (see below), whose sum is σ = 4121472444. Its totient is φ = 4121208000.

The previous prime is 4121340187. The next prime is 4121340233. The reversal of 4121340221 is 1220431214.

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 3553471321 + 567868900 = 59611^2 + 23830^2 .

It is a cyclic number.

It is not a de Polignac number, because 4121340221 - 2³⁰ = 3047598397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4121340193 and 4121340202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4121340241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9371 + ... + 91271.

It is an arithmetic number, because the mean of its divisors is an integer number (1030368111).

Almost surely, 2^4121340221 is an apocalyptic number.

It is an amenable number.

4121340221 is a deficient number, since it is larger than the sum of its proper divisors (132223).

4121340221 is an equidigital number, since it uses as much as digits as its factorization.

4121340221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132222.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 4121340221 is about 64197.6652301312. The cubic root of 4121340221 is about 1603.2927270123.

Adding to 4121340221 its reverse (1220431214), we get a palindrome (5341771435).

The spelling of 4121340221 in words is "four billion, one hundred twenty-one million, three hundred forty thousand, two hundred twenty-one".