801720035101 has 2 divisors, whose sum is σ = 801720035102. Its totient is φ = 801720035100.

The previous prime is 801720035059. The next prime is 801720035161. The reversal of 801720035101 is 101530027108.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 586028525625 + 215691509476 = 765525^2 + 464426^2 .

It is a cyclic number.

It is not a de Polignac number, because 801720035101 - 2⁹ = 801720034589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 801720035101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (801720035161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400860017550 + 400860017551.

It is an arithmetic number, because the mean of its divisors is an integer number (400860017551).

Almost surely, 2^801720035101 is an apocalyptic number.

It is an amenable number.

801720035101 is a deficient number, since it is larger than the sum of its proper divisors (1).

801720035101 is an equidigital number, since it uses as much as digits as its factorization.

801720035101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 28.

The spelling of 801720035101 in words is "eight hundred one billion, seven hundred twenty million, thirty-five thousand, one hundred one".