220021220212221 has 32 divisors (see below), whose sum is σ = 306833849118720. Its totient is φ = 139974698635200.

The previous prime is 220021220212153. The next prime is 220021220212291. The reversal of 220021220212221 is 122212022120022.

It is not a de Polignac number, because 220021220212221 - 2¹⁴ = 220021220195837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220021220212291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183225756 + ... + 184422666.

It is an arithmetic number, because the mean of its divisors is an integer number (9588557784960).

Almost surely, 2^{220021220212221} is an apocalyptic number.

It is an amenable number.

220021220212221 is a deficient number, since it is larger than the sum of its proper divisors (86812628906499).

220021220212221 is a wasteful number, since it uses less digits than its factorization.

220021220212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203177.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 220021220212221 its reverse (122212022120022), we get a palindrome (342233242332243).

The spelling of 220021220212221 in words is "two hundred twenty trillion, twenty-one billion, two hundred twenty million, two hundred twelve thousand, two hundred twenty-one".