133303211221 has 4 divisors (see below), whose sum is σ = 133306266700. Its totient is φ = 133300155744.

The previous prime is 133303211219. The next prime is 133303211231. The reversal of 133303211221 is 122112303331.

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 95781584196 + 37521627025 = 309486^2 + 193705^2 .

It is a cyclic number.

It is not a de Polignac number, because 133303211221 - 2¹ = 133303211219 is a prime.

It is a super-2 number, since 2×133303211221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133303211192 and 133303211201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133303211201) 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, 1461336 + ... + 1549873.

It is an arithmetic number, because the mean of its divisors is an integer number (33326566675).

Almost surely, 2^133303211221 is an apocalyptic number.

It is an amenable number.

133303211221 is a deficient number, since it is larger than the sum of its proper divisors (3055479).

133303211221 is an equidigital number, since it uses as much as digits as its factorization.

133303211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3055478.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 133303211221 its reverse (122112303331), we get a palindrome (255415514552).

The spelling of 133303211221 in words is "one hundred thirty-three billion, three hundred three million, two hundred eleven thousand, two hundred twenty-one".