133110221 has 6 divisors (see below), whose sum is σ = 141401130. Its totient is φ = 125279936.

The previous prime is 133110209. The next prime is 133110227. The reversal of 133110221 is 122011331.

It can be written as a sum of positive squares in 3 ways, for example, as 17547721 + 115562500 = 4189^2 + 10750^2 .

It is not a de Polignac number, because 133110221 - 2¹⁴ = 133093837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133110196 and 133110205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133110227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 230006 + ... + 230583.

It is an arithmetic number, because the mean of its divisors is an integer number (23566855).

Almost surely, 2^133110221 is an apocalyptic number.

It is an amenable number.

133110221 is a deficient number, since it is larger than the sum of its proper divisors (8290909).

133110221 is an equidigital number, since it uses as much as digits as its factorization.

133110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460623 (or 460606 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 133110221 is about 11537.3402914190. The cubic root of 133110221 is about 510.5878406961.

Adding to 133110221 its reverse (122011331), we get a palindrome (255121552).

It can be divided in two parts, 133110 and 221, that added together give a palindrome (133331).

The spelling of 133110221 in words is "one hundred thirty-three million, one hundred ten thousand, two hundred twenty-one".