3723121216 has 28 divisors (see below), whose sum is σ = 7390254460. Its totient is φ = 1861009920.

The previous prime is 3723121177. The next prime is 3723121219. The reversal of 3723121216 is 6121213273.

It can be written as a sum of positive squares in 2 ways, for example, as 775065600 + 2948055616 = 27840^2 + 54296^2 .

It is not an unprimeable number, because it can be changed into a prime (3723121219) 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, 289450 + ... + 302038.

Almost surely, 2^3723121216 is an apocalyptic number.

It is an amenable number.

3723121216 is a deficient number, since it is larger than the sum of its proper divisors (3667133244).

3723121216 is a wasteful number, since it uses less digits than its factorization.

3723121216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17222 (or 17212 counting only the distinct ones).

The product of its digits is 3024, while the sum is 28.

The square root of 3723121216 is about 61017.3845391623. The cubic root of 3723121216 is about 1549.8954096613.

Adding to 3723121216 its reverse (6121213273), we get a palindrome (9844334489).

The spelling of 3723121216 in words is "three billion, seven hundred twenty-three million, one hundred twenty-one thousand, two hundred sixteen".