4321722436021 has 2 divisors, whose sum is σ = 4321722436022. Its totient is φ = 4321722436020.

The previous prime is 4321722435941. The next prime is 4321722436027. The reversal of 4321722436021 is 1206342271234.

4321722436021 is digitally balanced in base 3, 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., 3516521307121 + 805201128900 = 1875239^2 + 897330^2 .

It is a cyclic number.

It is not a de Polignac number, because 4321722436021 - 2²⁵ = 4321688881589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4321722436027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2160861218010 + 2160861218011.

It is an arithmetic number, because the mean of its divisors is an integer number (2160861218011).

Almost surely, 2^{4321722436021} is an apocalyptic number.

It is an amenable number.

4321722436021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4321722436021 is an equidigital number, since it uses as much as digits as its factorization.

4321722436021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 37.

The spelling of 4321722436021 in words is "four trillion, three hundred twenty-one billion, seven hundred twenty-two million, four hundred thirty-six thousand, twenty-one".