133121044303421 has 8 divisors (see below), whose sum is σ = 137711655577080. Its totient is φ = 128530448392192.

The previous prime is 133121044303381. The next prime is 133121044303493. The reversal of 133121044303421 is 124303440121331.

It can be written as a sum of positive squares in 4 ways, for example, as 107990775043321 + 25130269260100 = 10391861^2 + 5013010^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133121044303421 - 2³⁰ = 133119970561597 is a prime.

It is a super-3 number, since 3×133121044303421³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133121044305421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15427421 + ... + 22455453.

It is an arithmetic number, because the mean of its divisors is an integer number (17213956947135).

Almost surely, 2^{133121044303421} is an apocalyptic number.

It is an amenable number.

133121044303421 is a deficient number, since it is larger than the sum of its proper divisors (4590611273659).

133121044303421 is an equidigital number, since it uses as much as digits as its factorization.

133121044303421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7681215.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 133121044303421 its reverse (124303440121331), we get a palindrome (257424484424752).

The spelling of 133121044303421 in words is "one hundred thirty-three trillion, one hundred twenty-one billion, forty-four million, three hundred three thousand, four hundred twenty-one".