220221110112021 has 6 divisors (see below), whose sum is σ = 318097159050710. Its totient is φ = 146814073408008.

The previous prime is 220221110111993. The next prime is 220221110112023. The reversal of 220221110112021 is 120211011122022.

220221110112021 is a `hidden beast` number, since 220 + 221 + 1 + 10 + 11 + 202 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 120300314422500 + 99920795689521 = 10968150^2 + 9996039^2 .

It is not a de Polignac number, because 220221110112021 - 2¹⁸ = 220221109849877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220221110111985 and 220221110112003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220221110112023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12234506117326 + ... + 12234506117343.

Almost surely, 2^{220221110112021} is an apocalyptic number.

It is an amenable number.

220221110112021 is a deficient number, since it is larger than the sum of its proper divisors (97876048938689).

220221110112021 is a wasteful number, since it uses less digits than its factorization.

220221110112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24469012234675 (or 24469012234672 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 220221110112021 its reverse (120211011122022), we get a palindrome (340432121234043).

The spelling of 220221110112021 in words is "two hundred twenty trillion, two hundred twenty-one billion, one hundred ten million, one hundred twelve thousand, twenty-one".