12431520133 has 4 divisors (see below), whose sum is σ = 12581297568. Its totient is φ = 12281742700.

The previous prime is 12431520119. The next prime is 12431520191. The reversal of 12431520133 is 33102513421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33102513421 = 827 ⋅40027223.

It is a cyclic number.

It is not a de Polignac number, because 12431520133 - 2²¹ = 12429422981 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12431520098 and 12431520107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12431523133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74888593 + ... + 74888758.

It is an arithmetic number, because the mean of its divisors is an integer number (3145324392).

Almost surely, 2^12431520133 is an apocalyptic number.

It is an amenable number.

12431520133 is a deficient number, since it is larger than the sum of its proper divisors (149777435).

12431520133 is an equidigital number, since it uses as much as digits as its factorization.

12431520133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149777434.

The product of its (nonzero) digits is 2160, while the sum is 25.

The spelling of 12431520133 in words is "twelve billion, four hundred thirty-one million, five hundred twenty thousand, one hundred thirty-three".