20031113133221 has 8 divisors (see below), whose sum is σ = 20594880343680. Its totient is φ = 19468524121488.

The previous prime is 20031113133193. The next prime is 20031113133247. The reversal of 20031113133221 is 12233131113002.

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 20031113133221 - 2¹⁰ = 20031113132197 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 (20031113133721) 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, 294515201 + ... + 294583206.

It is an arithmetic number, because the mean of its divisors is an integer number (2574360042960).

Almost surely, 2^{20031113133221} is an apocalyptic number.

It is an amenable number.

20031113133221 is a deficient number, since it is larger than the sum of its proper divisors (563767210459).

20031113133221 is an equidigital number, since it uses as much as digits as its factorization.

20031113133221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589099363.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 20031113133221 its reverse (12233131113002), we get a palindrome (32264244246223).

The spelling of 20031113133221 in words is "twenty trillion, thirty-one billion, one hundred thirteen million, one hundred thirty-three thousand, two hundred twenty-one".