133321333021 has 4 divisors (see below), whose sum is σ = 133359768700. Its totient is φ = 133282897344.

The previous prime is 133321332979. The next prime is 133321333039. The reversal of 133321333021 is 120333123331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8156799225 + 125164533796 = 90315^2 + 353786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133321333021 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 (133321333091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19212636 + ... + 19219573.

It is an arithmetic number, because the mean of its divisors is an integer number (33339942175).

Almost surely, 2^133321333021 is an apocalyptic number.

It is an amenable number.

133321333021 is a deficient number, since it is larger than the sum of its proper divisors (38435679).

133321333021 is an equidigital number, since it uses as much as digits as its factorization.

133321333021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38435678.

The product of its (nonzero) digits is 2916, while the sum is 25.

Adding to 133321333021 its reverse (120333123331), we get a palindrome (253654456352).

The spelling of 133321333021 in words is "one hundred thirty-three billion, three hundred twenty-one million, three hundred thirty-three thousand, twenty-one".