221313132021109 has 2 divisors, whose sum is σ = 221313132021110. Its totient is φ = 221313132021108.

The previous prime is 221313132021041. The next prime is 221313132021131. The reversal of 221313132021109 is 901120231313122.

It is a happy number.

221313132021109 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., 146496600402084 + 74816531619025 = 12103578^2 + 8649655^2 .

It is a cyclic number.

It is not a de Polignac number, because 221313132021109 - 2²¹ = 221313129923957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221313132021139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110656566010554 + 110656566010555.

It is an arithmetic number, because the mean of its divisors is an integer number (110656566010555).

Almost surely, 2^{221313132021109} is an apocalyptic number.

It is an amenable number.

221313132021109 is a deficient number, since it is larger than the sum of its proper divisors (1).

221313132021109 is an equidigital number, since it uses as much as digits as its factorization.

221313132021109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 221313132021109 in words is "two hundred twenty-one trillion, three hundred thirteen billion, one hundred thirty-two million, twenty-one thousand, one hundred nine".