220212220012221 has 4 divisors (see below), whose sum is σ = 293616293349632. Its totient is φ = 146808146674812.

The previous prime is 220212220012217. The next prime is 220212220012247. The reversal of 220212220012221 is 122210022212022.

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 220212220012221 - 2² = 220212220012217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220212220012021) 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, 36702036668701 + ... + 36702036668706.

It is an arithmetic number, because the mean of its divisors is an integer number (73404073337408).

Almost surely, 2^{220212220012221} is an apocalyptic number.

It is an amenable number.

220212220012221 is a deficient number, since it is larger than the sum of its proper divisors (73404073337411).

220212220012221 is an equidigital number, since it uses as much as digits as its factorization.

220212220012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73404073337410.

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

Adding to 220212220012221 its reverse (122210022212022), we get a palindrome (342422242224243).

The spelling of 220212220012221 in words is "two hundred twenty trillion, two hundred twelve billion, two hundred twenty million, twelve thousand, two hundred twenty-one".