133240520123 has 4 divisors (see below), whose sum is σ = 133259375760. Its totient is φ = 133221664488.

The previous prime is 133240520113. The next prime is 133240520191. The reversal of 133240520123 is 321025042331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321025042331 = 7 ⋅45860720333.

It is a cyclic number.

It is not a de Polignac number, because 133240520123 - 2¹² = 133240516027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133240520092 and 133240520101.

It is not an unprimeable number, because it can be changed into a prime (133240520113) 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, 9417215 + ... + 9431352.

It is an arithmetic number, because the mean of its divisors is an integer number (33314843940).

Almost surely, 2^133240520123 is an apocalyptic number.

133240520123 is a deficient number, since it is larger than the sum of its proper divisors (18855637).

133240520123 is an equidigital number, since it uses as much as digits as its factorization.

133240520123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18855636.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 133240520123 its reverse (321025042331), we get a palindrome (454265562454).

The spelling of 133240520123 in words is "one hundred thirty-three billion, two hundred forty million, five hundred twenty thousand, one hundred twenty-three".