721331032322201 has 16 divisors (see below), whose sum is σ = 825216583192320. Its totient is φ = 617655063735360.

The previous prime is 721331032322107. The next prime is 721331032322203. The reversal of 721331032322201 is 102223230133127.

721331032322201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-721331032322201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (721331032322203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 533015315 + ... + 534366903.

It is an arithmetic number, because the mean of its divisors is an integer number (51576036449520).

Almost surely, 2^{721331032322201} is an apocalyptic number.

It is an amenable number.

721331032322201 is a deficient number, since it is larger than the sum of its proper divisors (103885550870119).

721331032322201 is a wasteful number, since it uses less digits than its factorization.

721331032322201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429064.

The product of its (nonzero) digits is 18144, while the sum is 32.

Adding to 721331032322201 its reverse (102223230133127), we get a palindrome (823554262455328).

The spelling of 721331032322201 in words is "seven hundred twenty-one trillion, three hundred thirty-one billion, thirty-two million, three hundred twenty-two thousand, two hundred one".