133401531433421 has 8 divisors (see below), whose sum is σ = 138142834612920. Its totient is φ = 128669644945408.

The previous prime is 133401531433397. The next prime is 133401531433477. The reversal of 133401531433421 is 124334135104331.

It can be written as a sum of positive squares in 4 ways, for example, as 77406317263396 + 55995214170025 = 8798086^2 + 7482995^2 .

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 133401531433421 - 2²² = 133401527239117 is a prime.

It is a super-2 number, since 2×133401531433421² (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 (133401531436421) 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, 2354144036 + ... + 2354200701.

It is an arithmetic number, because the mean of its divisors is an integer number (17267854326615).

Almost surely, 2^{133401531433421} is an apocalyptic number.

It is an amenable number.

133401531433421 is a deficient number, since it is larger than the sum of its proper divisors (4741303179499).

133401531433421 is an equidigital number, since it uses as much as digits as its factorization.

133401531433421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4708345743.

The product of its (nonzero) digits is 155520, while the sum is 38.

Adding to 133401531433421 its reverse (124334135104331), we get a palindrome (257735666537752).

The spelling of 133401531433421 in words is "one hundred thirty-three trillion, four hundred one billion, five hundred thirty-one million, four hundred thirty-three thousand, four hundred twenty-one".