113541221 has 2 divisors, whose sum is σ = 113541222. Its totient is φ = 113541220.

The previous prime is 113541209. The next prime is 113541227. The reversal of 113541221 is 122145311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107848225 + 5692996 = 10385^2 + 2386^2 .

It is an emirp because it is prime and its reverse (122145311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 113541221 - 2¹⁸ = 113279077 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 113541193 and 113541202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113541227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56770610 + 56770611.

It is an arithmetic number, because the mean of its divisors is an integer number (56770611).

Almost surely, 2^113541221 is an apocalyptic number.

It is an amenable number.

113541221 is a deficient number, since it is larger than the sum of its proper divisors (1).

113541221 is an equidigital number, since it uses as much as digits as its factorization.

113541221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 240, while the sum is 20.

The square root of 113541221 is about 10655.5722980983. The cubic root of 113541221 is about 484.2294363903.

Adding to 113541221 its reverse (122145311), we get a palindrome (235686532).

The spelling of 113541221 in words is "one hundred thirteen million, five hundred forty-one thousand, two hundred twenty-one".