133201220 has 12 divisors (see below), whose sum is σ = 279722604. Its totient is φ = 53280480.

The previous prime is 133201213. The next prime is 133201223. The reversal of 133201220 is 22102331.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 63712324 + 69488896 = 7982^2 + 8336^2 .

It is a junction number, because it is equal to n+sod(n) for n = 133201195 and 133201204.

It is not an unprimeable number, because it can be changed into a prime (133201223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3330011 + ... + 3330050.

It is an arithmetic number, because the mean of its divisors is an integer number (23310217).

Almost surely, 2^133201220 is an apocalyptic number.

133201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133201220 is an abundant number, since it is smaller than the sum of its proper divisors (146521384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133201220 is a wasteful number, since it uses less digits than its factorization.

133201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6660070 (or 6660068 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 133201220 is about 11541.2832908650. The cubic root of 133201220 is about 510.7041663462.

Adding to 133201220 its reverse (22102331), we get a palindrome (155303551).

The spelling of 133201220 in words is "one hundred thirty-three million, two hundred one thousand, two hundred twenty".