221710299997 has 2 divisors, whose sum is σ = 221710299998. Its totient is φ = 221710299996.

The previous prime is 221710299959. The next prime is 221710300043. The reversal of 221710299997 is 799992017122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193975061476 + 27735238521 = 440426^2 + 166539^2 .

It is a cyclic number.

It is not a de Polignac number, because 221710299997 - 2¹⁹ = 221709775709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221710293997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110855149998 + 110855149999.

It is an arithmetic number, because the mean of its divisors is an integer number (110855149999).

Almost surely, 2^221710299997 is an apocalyptic number.

It is an amenable number.

221710299997 is a deficient number, since it is larger than the sum of its proper divisors (1).

221710299997 is an equidigital number, since it uses as much as digits as its factorization.

221710299997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2571912, while the sum is 58.

The spelling of 221710299997 in words is "two hundred twenty-one billion, seven hundred ten million, two hundred ninety-nine thousand, nine hundred ninety-seven".