2222220011221 has 128 divisors (see below), whose sum is σ = 2926861516800. Its totient is φ = 1643895751680.

The previous prime is 2222220011203. The next prime is 2222220011233. The reversal of 2222220011221 is 1221100222222.

It is not a de Polignac number, because 2222220011221 - 2¹⁷ = 2222219880149 is a prime.

It is a super-2 number, since 2×2222220011221² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222220011261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1096308810 + ... + 1096310836.

It is an arithmetic number, because the mean of its divisors is an integer number (22866105600).

Almost surely, 2^{2222220011221} is an apocalyptic number.

It is an amenable number.

2222220011221 is a deficient number, since it is larger than the sum of its proper divisors (704641505579).

2222220011221 is a wasteful number, since it uses less digits than its factorization.

2222220011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2339.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2222220011221 its reverse (1221100222222), we get a palindrome (3443320233443).

The spelling of 2222220011221 in words is "two trillion, two hundred twenty-two billion, two hundred twenty million, eleven thousand, two hundred twenty-one".