220021211112021 has 24 divisors (see below), whose sum is σ = 346831765577856. Its totient is φ = 133295544191040.

The previous prime is 220021211111993. The next prime is 220021211112113. The reversal of 220021211112021 is 120211112120022.

220021211112021 is a `hidden beast` number, since 2 + 200 + 212 + 111 + 120 + 21 = 666.

It is not a de Polignac number, because 220021211112021 - 2⁷ = 220021211111893 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 220021211111985 and 220021211112003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220021211162021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 421774365 + ... + 422295698.

It is an arithmetic number, because the mean of its divisors is an integer number (14451323565744).

Almost surely, 2^{220021211112021} is an apocalyptic number.

It is an amenable number.

220021211112021 is a deficient number, since it is larger than the sum of its proper divisors (126810554465835).

220021211112021 is a wasteful number, since it uses less digits than its factorization.

220021211112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844072713 (or 844072710 counting only the distinct ones).

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

Adding to 220021211112021 its reverse (120211112120022), we get a palindrome (340232323232043).

The spelling of 220021211112021 in words is "two hundred twenty trillion, twenty-one billion, two hundred eleven million, one hundred twelve thousand, twenty-one".