721010000100001 has 8 divisors (see below), whose sum is σ = 721093720878720. Its totient is φ = 720926283447888.

The previous prime is 721010000099927. The next prime is 721010000100007. The reversal of 721010000100001 is 100001000010127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 721010000100001 - 2¹¹ = 721010000097953 is a prime.

It is a Duffinian number.

721010000100001 is a modest number, since divided by 100001 gives 72101 as remainder.

It is not an unprimeable number, because it can be changed into a prime (721010000100007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355557975 + ... + 357580051.

It is an arithmetic number, because the mean of its divisors is an integer number (90136715109840).

Almost surely, 2^{721010000100001} is an apocalyptic number.

It is an amenable number.

721010000100001 is a deficient number, since it is larger than the sum of its proper divisors (83720778719).

721010000100001 is a wasteful number, since it uses less digits than its factorization.

721010000100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2063303.

The product of its (nonzero) digits is 14, while the sum is 13.

Adding to 721010000100001 its reverse (100001000010127), we get a palindrome (821011000110128).

The spelling of 721010000100001 in words is "seven hundred twenty-one trillion, ten billion, one hundred thousand, one".