133325534021 has 4 divisors (see below), whose sum is σ = 133326290700. Its totient is φ = 133324777344.

The previous prime is 133325533969. The next prime is 133325534039. The reversal of 133325534021 is 120435523331.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 309232225 + 133016301796 = 17585^2 + 364714^2 .

It is a cyclic number.

It is not a de Polignac number, because 133325534021 - 2¹⁰ = 133325532997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133325534621) 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, 40565 + ... + 517973.

It is an arithmetic number, because the mean of its divisors is an integer number (33331572675).

Almost surely, 2^133325534021 is an apocalyptic number.

It is an amenable number.

133325534021 is a deficient number, since it is larger than the sum of its proper divisors (756679).

133325534021 is an equidigital number, since it uses as much as digits as its factorization.

133325534021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756678.

The product of its (nonzero) digits is 32400, while the sum is 32.

The spelling of 133325534021 in words is "one hundred thirty-three billion, three hundred twenty-five million, five hundred thirty-four thousand, twenty-one".