220021302331021 has 16 divisors (see below), whose sum is σ = 222098747492160. Its totient is φ = 217949953703040.

The previous prime is 220021302331013. The next prime is 220021302331057. The reversal of 220021302331021 is 120133203120022.

It is a cyclic number.

It is not a de Polignac number, because 220021302331021 - 2³ = 220021302331013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220021302330983 and 220021302331001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220021302331081) 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, 883960375 + ... + 884209243.

It is an arithmetic number, because the mean of its divisors is an integer number (13881171718260).

Almost surely, 2^{220021302331021} is an apocalyptic number.

It is an amenable number.

220021302331021 is a deficient number, since it is larger than the sum of its proper divisors (2077445161139).

220021302331021 is a wasteful number, since it uses less digits than its factorization.

220021302331021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261084.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 220021302331021 its reverse (120133203120022), we get a palindrome (340154505451043).

The spelling of 220021302331021 in words is "two hundred twenty trillion, twenty-one billion, three hundred two million, three hundred thirty-one thousand, twenty-one".