2220221221221 has 8 divisors (see below), whose sum is σ = 2965553036640. Its totient is φ = 1477518443312.

The previous prime is 2220221221213. The next prime is 2220221221249. The reversal of 2220221221221 is 1221221220222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2220221221221 - 2³ = 2220221221213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220221221201) 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 7 ways as a sum of consecutive naturals, for example, 657257406 + ... + 657260783.

It is an arithmetic number, because the mean of its divisors is an integer number (370694129580).

Almost surely, 2^{2220221221221} is an apocalyptic number.

It is an amenable number.

2220221221221 is a deficient number, since it is larger than the sum of its proper divisors (745331815419).

2220221221221 is a wasteful number, since it uses less digits than its factorization.

2220221221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314518755.

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

Adding to 2220221221221 its reverse (1221221220222), we get a palindrome (3441442441443).

Subtracting from 2220221221221 its reverse (1221221220222), we obtain a palindrome (999000000999).

It can be divided in two parts, 2220221 and 221221, that added together give a palindrome (2441442).

The spelling of 2220221221221 in words is "two trillion, two hundred twenty billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty-one".