721011010001 has 32 divisors (see below), whose sum is σ = 787503974400. Its totient is φ = 657462355200.

The previous prime is 721011009977. The next prime is 721011010019. The reversal of 721011010001 is 100010110127.

It is a cyclic number.

It is not a de Polignac number, because 721011010001 - 2¹⁴ = 721010993617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (721011010021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81567140 + ... + 81575978.

It is an arithmetic number, because the mean of its divisors is an integer number (24609499200).

Almost surely, 2^721011010001 is an apocalyptic number.

It is an amenable number.

721011010001 is a deficient number, since it is larger than the sum of its proper divisors (66492964399).

721011010001 is a wasteful number, since it uses less digits than its factorization.

721011010001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9789.

The product of its (nonzero) digits is 14, while the sum is 14.

Adding to 721011010001 its reverse (100010110127), we get a palindrome (821021120128).

The spelling of 721011010001 in words is "seven hundred twenty-one billion, eleven million, ten thousand, one".