4344213121 has 4 divisors (see below), whose sum is σ = 4361116932. Its totient is φ = 4327309312.

The previous prime is 4344213103. The next prime is 4344213151. The reversal of 4344213121 is 1213124434.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1213124434 = 2 ⋅606562217.

It can be written as a sum of positive squares in 2 ways, for example, as 4298244721 + 45968400 = 65561^2 + 6780^2 .

It is a cyclic number.

It is not a de Polignac number, because 4344213121 - 2¹⁵ = 4344180353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4344213151) 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, 8451520 + ... + 8452033.

It is an arithmetic number, because the mean of its divisors is an integer number (1090279233).

Almost surely, 2^4344213121 is an apocalyptic number.

It is an amenable number.

4344213121 is a deficient number, since it is larger than the sum of its proper divisors (16903811).

4344213121 is a wasteful number, since it uses less digits than its factorization.

4344213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16903810.

The product of its digits is 2304, while the sum is 25.

The square root of 4344213121 is about 65910.6449748445. The cubic root of 4344213121 is about 1631.6877046904.

Adding to 4344213121 its reverse (1213124434), we get a palindrome (5557337555).

The spelling of 4344213121 in words is "four billion, three hundred forty-four million, two hundred thirteen thousand, one hundred twenty-one".