220100211221 has 4 divisors (see below), whose sum is σ = 240109321344. Its totient is φ = 200091101100.

The previous prime is 220100211211. The next prime is 220100211239. The reversal of 220100211221 is 122112001022.

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 not a de Polignac number, because 220100211221 - 2¹⁴ = 220100194837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220100211196 and 220100211205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220100211211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10004555045 + ... + 10004555066.

It is an arithmetic number, because the mean of its divisors is an integer number (60027330336).

Almost surely, 2^220100211221 is an apocalyptic number.

It is an amenable number.

220100211221 is a deficient number, since it is larger than the sum of its proper divisors (20009110123).

220100211221 is a wasteful number, since it uses less digits than its factorization.

220100211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20009110122.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 220100211221 its reverse (122112001022), we get a palindrome (342212212243).

The spelling of 220100211221 in words is "two hundred twenty billion, one hundred million, two hundred eleven thousand, two hundred twenty-one".