101720530201 has 2 divisors, whose sum is σ = 101720530202. Its totient is φ = 101720530200.

The previous prime is 101720530187. The next prime is 101720530259. The reversal of 101720530201 is 102035027101.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79571947225 + 22148582976 = 282085^2 + 148824^2 .

It is a cyclic number.

It is not a de Polignac number, because 101720530201 - 2⁷ = 101720530073 is a prime.

It is not a weakly prime, because it can be changed into another prime (101720530291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50860265100 + 50860265101.

It is an arithmetic number, because the mean of its divisors is an integer number (50860265101).

Almost surely, 2^101720530201 is an apocalyptic number.

It is an amenable number.

101720530201 is a deficient number, since it is larger than the sum of its proper divisors (1).

101720530201 is an equidigital number, since it uses as much as digits as its factorization.

101720530201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 22.

Adding to 101720530201 its reverse (102035027101), we get a palindrome (203755557302).

The spelling of 101720530201 in words is "one hundred one billion, seven hundred twenty million, five hundred thirty thousand, two hundred one".