201220221109 has 2 divisors, whose sum is σ = 201220221110. Its totient is φ = 201220221108.

The previous prime is 201220221043. The next prime is 201220221121. The reversal of 201220221109 is 901122022102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170055614884 + 31164606225 = 412378^2 + 176535^2 .

It is a cyclic number.

It is not a de Polignac number, because 201220221109 - 2²⁷ = 201086003381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201220221109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201220225109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610110554 + 100610110555.

It is an arithmetic number, because the mean of its divisors is an integer number (100610110555).

Almost surely, 2^201220221109 is an apocalyptic number.

It is an amenable number.

201220221109 is a deficient number, since it is larger than the sum of its proper divisors (1).

201220221109 is an equidigital number, since it uses as much as digits as its factorization.

201220221109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 201220221109 in words is "two hundred one billion, two hundred twenty million, two hundred twenty-one thousand, one hundred nine".