201113261 has 2 divisors, whose sum is σ = 201113262. Its totient is φ = 201113260.

The previous prime is 201113249. The next prime is 201113267. The reversal of 201113261 is 162311102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166668100 + 34445161 = 12910^2 + 5869^2 .

It is a cyclic number.

It is not a de Polignac number, because 201113261 - 2¹⁸ = 200851117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201113267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100556630 + 100556631.

It is an arithmetic number, because the mean of its divisors is an integer number (100556631).

Almost surely, 2^201113261 is an apocalyptic number.

It is an amenable number.

201113261 is a deficient number, since it is larger than the sum of its proper divisors (1).

201113261 is an equidigital number, since it uses as much as digits as its factorization.

201113261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 201113261 is about 14181.4407237065. The cubic root of 201113261 is about 585.8866055483.

Adding to 201113261 its reverse (162311102), we get a palindrome (363424363).

The spelling of 201113261 in words is "two hundred one million, one hundred thirteen thousand, two hundred sixty-one".