20133331100321 has 4 divisors (see below), whose sum is σ = 20133347223444. Its totient is φ = 20133314977200.

The previous prime is 20133331100291. The next prime is 20133331100347. The reversal of 20133331100321 is 12300113333102.

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 689323365025 + 19444007735296 = 830255^2 + 4409536^2 .

It is a cyclic number.

It is not a de Polignac number, because 20133331100321 - 2⁶ = 20133331100257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20133331100221) 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, 6015350 + ... + 8743631.

It is an arithmetic number, because the mean of its divisors is an integer number (5033336805861).

Almost surely, 2^{20133331100321} is an apocalyptic number.

It is an amenable number.

20133331100321 is a deficient number, since it is larger than the sum of its proper divisors (16123123).

20133331100321 is a wasteful number, since it uses less digits than its factorization.

20133331100321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16123122.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 20133331100321 its reverse (12300113333102), we get a palindrome (32433444433423).

The spelling of 20133331100321 in words is "twenty trillion, one hundred thirty-three billion, three hundred thirty-one million, one hundred thousand, three hundred twenty-one".