133101218 has 4 divisors (see below), whose sum is σ = 199651830. Its totient is φ = 66550608.

The previous prime is 133101217. The next prime is 133101233. The reversal of 133101218 is 812101331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 812101331 = 10343 ⋅78517.

It can be written as a sum of positive squares in only one way, i.e., 132549169 + 552049 = 11513^2 + 743^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 133101218.

It is not an unprimeable number, because it can be changed into a prime (133101217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33275303 + ... + 33275306.

Almost surely, 2^133101218 is an apocalyptic number.

133101218 is a deficient number, since it is larger than the sum of its proper divisors (66550612).

133101218 is an equidigital number, since it uses as much as digits as its factorization.

133101218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66550611.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 133101218 is about 11536.9501169070. The cubic root of 133101218 is about 510.5763291183.

Adding to 133101218 its reverse (812101331), we get a palindrome (945202549).

The spelling of 133101218 in words is "one hundred thirty-three million, one hundred one thousand, two hundred eighteen".