133033031213221 has 4 divisors (see below), whose sum is σ = 133080526050444. Its totient is φ = 132985536376000.

The previous prime is 133033031213207. The next prime is 133033031213227. The reversal of 133033031213221 is 122312130330331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 108489181282596 + 24543849930625 = 10415814^2 + 4954175^2 .

It is a cyclic number.

It is not a de Polignac number, because 133033031213221 - 2⁵ = 133033031213189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133033031213221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133033031213227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23747414410 + ... + 23747420011.

It is an arithmetic number, because the mean of its divisors is an integer number (33270131512611).

Almost surely, 2^{133033031213221} is an apocalyptic number.

It is an amenable number.

133033031213221 is a deficient number, since it is larger than the sum of its proper divisors (47494837223).

133033031213221 is an equidigital number, since it uses as much as digits as its factorization.

133033031213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47494837222.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 133033031213221 its reverse (122312130330331), we get a palindrome (255345161543552).

The spelling of 133033031213221 in words is "one hundred thirty-three trillion, thirty-three billion, thirty-one million, two hundred thirteen thousand, two hundred twenty-one".