20130333231221 has 32 divisors (see below), whose sum is σ = 20933738496000. Its totient is φ = 19344032443008.

The previous prime is 20130333231209. The next prime is 20130333231233. The reversal of 20130333231221 is 12213233303102.

It is an interprime number because it is at equal distance from previous prime (20130333231209) and next prime (20130333231233).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20130333231221 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 (20130333231271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1747570700 + ... + 1747582218.

It is an arithmetic number, because the mean of its divisors is an integer number (654179328000).

Almost surely, 2^{20130333231221} is an apocalyptic number.

It is an amenable number.

20130333231221 is a deficient number, since it is larger than the sum of its proper divisors (803405264779).

20130333231221 is a wasteful number, since it uses less digits than its factorization.

20130333231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13433.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 20130333231221 its reverse (12213233303102), we get a palindrome (32343566534323).

The spelling of 20130333231221 in words is "twenty trillion, one hundred thirty billion, three hundred thirty-three million, two hundred thirty-one thousand, two hundred twenty-one".