20112103031221 has 8 divisors (see below), whose sum is σ = 20990767607424. Its totient is φ = 19233790564560.

The previous prime is 20112103031203. The next prime is 20112103031227. The reversal of 20112103031221 is 12213030121102.

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 20112103031221 - 2⁷ = 20112103031093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112103031227) 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, 87910650 + ... + 88139131.

It is an arithmetic number, because the mean of its divisors is an integer number (2623845950928).

Almost surely, 2^{20112103031221} is an apocalyptic number.

It is an amenable number.

20112103031221 is a deficient number, since it is larger than the sum of its proper divisors (878664576203).

20112103031221 is a wasteful number, since it uses less digits than its factorization.

20112103031221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176054771.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 20112103031221 its reverse (12213030121102), we get a palindrome (32325133152323).

The spelling of 20112103031221 in words is "twenty trillion, one hundred twelve billion, one hundred three million, thirty-one thousand, two hundred twenty-one".