4012421321 has 2 divisors, whose sum is σ = 4012421322. Its totient is φ = 4012421320.

The previous prime is 4012421293. The next prime is 4012421327. The reversal of 4012421321 is 1231242104.

4012421321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3750337600 + 262083721 = 61240^2 + 16189^2 .

It is a cyclic number.

It is not a de Polignac number, because 4012421321 - 2¹⁰ = 4012420297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4012421293 and 4012421302.

It is not a weakly prime, because it can be changed into another prime (4012421327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2006210660 + 2006210661.

It is an arithmetic number, because the mean of its divisors is an integer number (2006210661).

Almost surely, 2^4012421321 is an apocalyptic number.

It is an amenable number.

4012421321 is a deficient number, since it is larger than the sum of its proper divisors (1).

4012421321 is an equidigital number, since it uses as much as digits as its factorization.

4012421321 is an evil number, because the sum of its binary digits is even.

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

The square root of 4012421321 is about 63343.6762510671. The cubic root of 4012421321 is about 1589.0424889061.

Adding to 4012421321 its reverse (1231242104), we get a palindrome (5243663425).

The spelling of 4012421321 in words is "four billion, twelve million, four hundred twenty-one thousand, three hundred twenty-one".