20113031323221 has 16 divisors (see below), whose sum is σ = 29202223339200. Its totient is φ = 12264933800448.

The previous prime is 20113031323213. The next prime is 20113031323249. The reversal of 20113031323221 is 12232313031102.

It is not a de Polignac number, because 20113031323221 - 2³ = 20113031323213 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20113031323191 and 20113031323200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113031323261) 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 15 ways as a sum of consecutive naturals, for example, 6083794876 + ... + 6083798181.

It is an arithmetic number, because the mean of its divisors is an integer number (1825138958700).

Almost surely, 2^{20113031323221} is an apocalyptic number.

It is an amenable number.

20113031323221 is a deficient number, since it is larger than the sum of its proper divisors (9089192015979).

20113031323221 is a wasteful number, since it uses less digits than its factorization.

20113031323221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12167593108.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 20113031323221 its reverse (12232313031102), we get a palindrome (32345344354323).

The spelling of 20113031323221 in words is "twenty trillion, one hundred thirteen billion, thirty-one million, three hundred twenty-three thousand, two hundred twenty-one".