220010221 has 4 divisors (see below), whose sum is σ = 221116000. Its totient is φ = 218904444.

The previous prime is 220010213. The next prime is 220010227. The reversal of 220010221 is 122010022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220010221 - 2³ = 220010213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220010198 and 220010207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220010227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 552591 + ... + 552988.

It is an arithmetic number, because the mean of its divisors is an integer number (55279000).

Almost surely, 2^220010221 is an apocalyptic number.

It is an amenable number.

220010221 is a deficient number, since it is larger than the sum of its proper divisors (1105779).

220010221 is a wasteful number, since it uses less digits than its factorization.

220010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105778.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 220010221 is about 14832.7415200293. The cubic root of 220010221 is about 603.6904223596.

Adding to 220010221 its reverse (122010022), we get a palindrome (342020243).

It can be divided in two parts, 2200 and 10221, that added together give a palindrome (12421).

The spelling of 220010221 in words is "two hundred twenty million, ten thousand, two hundred twenty-one".