220221321221 has 16 divisors (see below), whose sum is σ = 242664061248. Its totient is φ = 198183072000.

The previous prime is 220221321209. The next prime is 220221321247. The reversal of 220221321221 is 122123122022.

It is a cyclic number.

It is not a de Polignac number, because 220221321221 - 2¹⁴ = 220221304837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220221321193 and 220221321202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220221321421) 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, 7543565 + ... + 7572701.

It is an arithmetic number, because the mean of its divisors is an integer number (15166503828).

Almost surely, 2^220221321221 is an apocalyptic number.

It is an amenable number.

220221321221 is a deficient number, since it is larger than the sum of its proper divisors (22442740027).

220221321221 is a wasteful number, since it uses less digits than its factorization.

220221321221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36052.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 220221321221 its reverse (122123122022), we get a palindrome (342344443243).

The spelling of 220221321221 in words is "two hundred twenty billion, two hundred twenty-one million, three hundred twenty-one thousand, two hundred twenty-one".