4012216321 has 4 divisors (see below), whose sum is σ = 4034383444. Its totient is φ = 3990049200.

The previous prime is 4012216289. The next prime is 4012216331. The reversal of 4012216321 is 1236122104.

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 1209996225 + 2802220096 = 34785^2 + 52936^2 .

It is a cyclic number.

It is not a de Polignac number, because 4012216321 - 2⁵ = 4012216289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4012216292 and 4012216301.

It is not an unprimeable number, because it can be changed into a prime (4012216331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11083290 + ... + 11083651.

It is an arithmetic number, because the mean of its divisors is an integer number (1008595861).

Almost surely, 2^4012216321 is an apocalyptic number.

It is an amenable number.

4012216321 is a deficient number, since it is larger than the sum of its proper divisors (22167123).

4012216321 is a wasteful number, since it uses less digits than its factorization.

4012216321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22167122.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 4012216321 is about 63342.0580736054. The cubic root of 4012216321 is about 1589.0154263395.

Adding to 4012216321 its reverse (1236122104), we get a palindrome (5248338425).

The spelling of 4012216321 in words is "four billion, twelve million, two hundred sixteen thousand, three hundred twenty-one".