4032321228721 has 2 divisors, whose sum is σ = 4032321228722. Its totient is φ = 4032321228720.

The previous prime is 4032321228707. The next prime is 4032321228773. The reversal of 4032321228721 is 1278221232304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3186171450225 + 846149778496 = 1784985^2 + 919864^2 .

It is a cyclic number.

It is not a de Polignac number, because 4032321228721 - 2²¹ = 4032319131569 is a prime.

It is a super-2 number, since 2×4032321228721² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4032321228791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2016160614360 + 2016160614361.

It is an arithmetic number, because the mean of its divisors is an integer number (2016160614361).

Almost surely, 2^{4032321228721} is an apocalyptic number.

It is an amenable number.

4032321228721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4032321228721 is an equidigital number, since it uses as much as digits as its factorization.

4032321228721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 37.

The spelling of 4032321228721 in words is "four trillion, thirty-two billion, three hundred twenty-one million, two hundred twenty-eight thousand, seven hundred twenty-one".