133520423131 has 2 divisors, whose sum is σ = 133520423132. Its totient is φ = 133520423130.

The previous prime is 133520423123. The next prime is 133520423143. The reversal of 133520423131 is 131324025331.

It is a weak prime.

It is an emirp because it is prime and its reverse (131324025331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133520423131 - 2³ = 133520423123 is a prime.

It is a super-2 number, since 2×133520423131² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 133520423131.

It is not a weakly prime, because it can be changed into another prime (133520423161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66760211565 + 66760211566.

It is an arithmetic number, because the mean of its divisors is an integer number (66760211566).

Almost surely, 2^133520423131 is an apocalyptic number.

133520423131 is a deficient number, since it is larger than the sum of its proper divisors (1).

133520423131 is an equidigital number, since it uses as much as digits as its factorization.

133520423131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 28.

Adding to 133520423131 its reverse (131324025331), we get a palindrome (264844448462).

The spelling of 133520423131 in words is "one hundred thirty-three billion, five hundred twenty million, four hundred twenty-three thousand, one hundred thirty-one".