133511240321 has 4 divisors (see below), whose sum is σ = 133694887872. Its totient is φ = 133327592772.

The previous prime is 133511240297. The next prime is 133511240323. The reversal of 133511240321 is 123042115331.

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: 123042115331 = 1301 ⋅94575031.

It is a cyclic number.

It is not a de Polignac number, because 133511240321 - 2³⁴ = 116331371137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133511240323) 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, 91822685 + ... + 91824138.

It is an arithmetic number, because the mean of its divisors is an integer number (33423721968).

Almost surely, 2^133511240321 is an apocalyptic number.

It is an amenable number.

133511240321 is a deficient number, since it is larger than the sum of its proper divisors (183647551).

133511240321 is an equidigital number, since it uses as much as digits as its factorization.

133511240321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183647550.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 133511240321 its reverse (123042115331), we get a palindrome (256553355652).

The spelling of 133511240321 in words is "one hundred thirty-three billion, five hundred eleven million, two hundred forty thousand, three hundred twenty-one".