220021300331021 has 16 divisors (see below), whose sum is σ = 251911131062400. Its totient is φ = 188246054519808.

The previous prime is 220021300331009. The next prime is 220021300331023. The reversal of 220021300331021 is 120133003120022.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220021300331021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220021300330984 and 220021300331002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220021300331023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85149245 + ... + 87695133.

It is an arithmetic number, because the mean of its divisors is an integer number (15744445691400).

Almost surely, 2^{220021300331021} is an apocalyptic number.

It is an amenable number.

220021300331021 is a deficient number, since it is larger than the sum of its proper divisors (31889830731379).

220021300331021 is a wasteful number, since it uses less digits than its factorization.

220021300331021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568388.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 220021300331021 its reverse (120133003120022), we get a palindrome (340154303451043).

The spelling of 220021300331021 in words is "two hundred twenty trillion, twenty-one billion, three hundred million, three hundred thirty-one thousand, twenty-one".