133761132321 has 4 divisors (see below), whose sum is σ = 178348176432. Its totient is φ = 89174088212.

The previous prime is 133761132299. The next prime is 133761132341. The reversal of 133761132321 is 123231167331.

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.

It is a cyclic number.

It is not a de Polignac number, because 133761132321 - 2⁶ = 133761132257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133761132341) 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, 22293522051 + ... + 22293522056.

It is an arithmetic number, because the mean of its divisors is an integer number (44587044108).

Almost surely, 2^133761132321 is an apocalyptic number.

It is an amenable number.

133761132321 is a deficient number, since it is larger than the sum of its proper divisors (44587044111).

133761132321 is an equidigital number, since it uses as much as digits as its factorization.

133761132321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44587044110.

The product of its digits is 13608, while the sum is 33.

Adding to 133761132321 its reverse (123231167331), we get a palindrome (256992299652).

The spelling of 133761132321 in words is "one hundred thirty-three billion, seven hundred sixty-one million, one hundred thirty-two thousand, three hundred twenty-one".