221745894301 has 2 divisors, whose sum is σ = 221745894302. Its totient is φ = 221745894300.

The previous prime is 221745894281. The next prime is 221745894313. The reversal of 221745894301 is 103498547122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139778776900 + 81967117401 = 373870^2 + 286299^2 .

It is a cyclic number.

It is not a de Polignac number, because 221745894301 - 2¹¹ = 221745892253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221745834301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110872947150 + 110872947151.

It is an arithmetic number, because the mean of its divisors is an integer number (110872947151).

Almost surely, 2^221745894301 is an apocalyptic number.

It is an amenable number.

221745894301 is a deficient number, since it is larger than the sum of its proper divisors (1).

221745894301 is an equidigital number, since it uses as much as digits as its factorization.

221745894301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 221745894301 in words is "two hundred twenty-one billion, seven hundred forty-five million, eight hundred ninety-four thousand, three hundred one".