201201109 has 2 divisors, whose sum is σ = 201201110. Its totient is φ = 201201108.

The previous prime is 201201061. The next prime is 201201113. The reversal of 201201109 is 901102102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151216209 + 49984900 = 12297^2 + 7070^2 .

It is a cyclic number.

It is not a de Polignac number, because 201201109 - 2¹³ = 201192917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201201092 and 201201101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201201709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100600554 + 100600555.

It is an arithmetic number, because the mean of its divisors is an integer number (100600555).

Almost surely, 2^201201109 is an apocalyptic number.

It is an amenable number.

201201109 is a deficient number, since it is larger than the sum of its proper divisors (1).

201201109 is an equidigital number, since it uses as much as digits as its factorization.

201201109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 201201109 is about 14184.5376731143. The cubic root of 201201109 is about 585.9718998978.

The spelling of 201201109 in words is "two hundred one million, two hundred one thousand, one hundred nine".