133121203328 has 16 divisors (see below), whose sum is σ = 265202397510. Its totient is φ = 66560601600.

The previous prime is 133121203321. The next prime is 133121203333. The reversal of 133121203328 is 823302121331.

It can be written as a sum of positive squares in only one way, i.e., 89420137024 + 43701066304 = 299032^2 + 209048^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 133121203328.

It is not an unprimeable number, because it can be changed into a prime (133121203321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520004573 + ... + 520004828.

Almost surely, 2^133121203328 is an apocalyptic number.

It is an amenable number.

133121203328 is a deficient number, since it is larger than the sum of its proper divisors (132081194182).

133121203328 is an equidigital number, since it uses as much as digits as its factorization.

133121203328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040009415 (or 1040009403 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 133121203328 its reverse (823302121331), we get a palindrome (956423324659).

The spelling of 133121203328 in words is "one hundred thirty-three billion, one hundred twenty-one million, two hundred three thousand, three hundred twenty-eight".