221530672333109 has 2 divisors, whose sum is σ = 221530672333110. Its totient is φ = 221530672333108.

The previous prime is 221530672333049. The next prime is 221530672333129. The reversal of 221530672333109 is 901333276035122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185204472730225 + 36326199602884 = 13608985^2 + 6027122^2 .

It is a cyclic number.

It is not a de Polignac number, because 221530672333109 - 2¹⁶ = 221530672267573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221530672333129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110765336166554 + 110765336166555.

It is an arithmetic number, because the mean of its divisors is an integer number (110765336166555).

Almost surely, 2^{221530672333109} is an apocalyptic number.

It is an amenable number.

221530672333109 is a deficient number, since it is larger than the sum of its proper divisors (1).

221530672333109 is an equidigital number, since it uses as much as digits as its factorization.

221530672333109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1224720, while the sum is 47.

The spelling of 221530672333109 in words is "two hundred twenty-one trillion, five hundred thirty billion, six hundred seventy-two million, three hundred thirty-three thousand, one hundred nine".