133043401212221 has 4 divisors (see below), whose sum is σ = 133046794436700. Its totient is φ = 133040007987744.

The previous prime is 133043401212181. The next prime is 133043401212223. The reversal of 133043401212221 is 122212104340331.

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 99817803064996 + 33225598147225 = 9990886^2 + 5764165^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133043401212221 is a prime.

It is a super-2 number, since 2×133043401212221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133043401212223) 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, 1696553426 + ... + 1696631843.

It is an arithmetic number, because the mean of its divisors is an integer number (33261698609175).

Almost surely, 2^{133043401212221} is an apocalyptic number.

It is an amenable number.

133043401212221 is a deficient number, since it is larger than the sum of its proper divisors (3393224479).

133043401212221 is an equidigital number, since it uses as much as digits as its factorization.

133043401212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3393224478.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 133043401212221 its reverse (122212104340331), we get a palindrome (255255505552552).

The spelling of 133043401212221 in words is "one hundred thirty-three trillion, forty-three billion, four hundred one million, two hundred twelve thousand, two hundred twenty-one".