20001233313221 has 8 divisors (see below), whose sum is σ = 20006628307200. Its totient is φ = 19995839060848.

The previous prime is 20001233313203. The next prime is 20001233313223. The reversal of 20001233313221 is 12231333210002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20001233313221 - 2³⁴ = 19984053444037 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 (20001233313223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56037080 + ... + 56392878.

It is an arithmetic number, because the mean of its divisors is an integer number (2500828538400).

Almost surely, 2^{20001233313221} is an apocalyptic number.

It is an amenable number.

20001233313221 is a deficient number, since it is larger than the sum of its proper divisors (5394993979).

20001233313221 is an equidigital number, since it uses as much as digits as its factorization.

20001233313221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370803.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 20001233313221 its reverse (12231333210002), we get a palindrome (32232566523223).

The spelling of 20001233313221 in words is "twenty trillion, one billion, two hundred thirty-three million, three hundred thirteen thousand, two hundred twenty-one".