4021326161 has 4 divisors (see below), whose sum is σ = 4026120000. Its totient is φ = 4016532324.

The previous prime is 4021326121. The next prime is 4021326163. The reversal of 4021326161 is 1616231204.

4021326161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4021326161 - 2¹⁸ = 4021064017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4021326161.

It is not an unprimeable number, because it can be changed into a prime (4021326163) 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, 2395661 + ... + 2397338.

It is an arithmetic number, because the mean of its divisors is an integer number (1006530000).

Almost surely, 2^4021326161 is an apocalyptic number.

It is an amenable number.

4021326161 is a deficient number, since it is larger than the sum of its proper divisors (4793839).

4021326161 is an equidigital number, since it uses as much as digits as its factorization.

4021326161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4793838.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 4021326161 is about 63413.9271848070. The cubic root of 4021326161 is about 1590.2171507012.

Adding to 4021326161 its reverse (1616231204), we get a palindrome (5637557365).

The spelling of 4021326161 in words is "four billion, twenty-one million, three hundred twenty-six thousand, one hundred sixty-one".