220021210221 has 16 divisors (see below), whose sum is σ = 300534409728. Its totient is φ = 143094828800.

The previous prime is 220021210177. The next prime is 220021210301. The reversal of 220021210221 is 122012120022.

It is a cyclic number.

It is not a de Polignac number, because 220021210221 - 2¹⁰ = 220021209197 is a prime.

It is a super-2 number, since 2×220021210221² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 220021210221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220021210021) 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, 2591281 + ... + 2674841.

It is an arithmetic number, because the mean of its divisors is an integer number (18783400608).

Almost surely, 2^220021210221 is an apocalyptic number.

It is an amenable number.

220021210221 is a deficient number, since it is larger than the sum of its proper divisors (80513199507).

220021210221 is a wasteful number, since it uses less digits than its factorization.

220021210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105012.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 220021210221 its reverse (122012120022), we get a palindrome (342033330243).

The spelling of 220021210221 in words is "two hundred twenty billion, twenty-one million, two hundred ten thousand, two hundred twenty-one".