220101985717 has 2 divisors, whose sum is σ = 220101985718. Its totient is φ = 220101985716.

The previous prime is 220101985687. The next prime is 220101985721. The reversal of 220101985717 is 717589101022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216788947236 + 3313038481 = 465606^2 + 57559^2 .

It is a cyclic number.

It is not a de Polignac number, because 220101985717 - 2¹⁵ = 220101952949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220101985777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110050992858 + 110050992859.

It is an arithmetic number, because the mean of its divisors is an integer number (110050992859).

Almost surely, 2^220101985717 is an apocalyptic number.

It is an amenable number.

220101985717 is a deficient number, since it is larger than the sum of its proper divisors (1).

220101985717 is an equidigital number, since it uses as much as digits as its factorization.

220101985717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 43.

The spelling of 220101985717 in words is "two hundred twenty billion, one hundred one million, nine hundred eighty-five thousand, seven hundred seventeen".