221475147109 has 2 divisors, whose sum is σ = 221475147110. Its totient is φ = 221475147108.

The previous prime is 221475147071. The next prime is 221475147121. The reversal of 221475147109 is 901741574122.

221475147109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220057624609 + 1417522500 = 469103^2 + 37650^2 .

It is a cyclic number.

It is not a de Polignac number, because 221475147109 - 2¹¹ = 221475145061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221475147149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110737573554 + 110737573555.

It is an arithmetic number, because the mean of its divisors is an integer number (110737573555).

Almost surely, 2^221475147109 is an apocalyptic number.

It is an amenable number.

221475147109 is a deficient number, since it is larger than the sum of its proper divisors (1).

221475147109 is an equidigital number, since it uses as much as digits as its factorization.

221475147109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 43.

The spelling of 221475147109 in words is "two hundred twenty-one billion, four hundred seventy-five million, one hundred forty-seven thousand, one hundred nine".