2221222211220 has 24 divisors (see below), whose sum is σ = 6219422191584. Its totient is φ = 592325922976.

The previous prime is 2221222211167. The next prime is 2221222211233. The reversal of 2221222211220 is 221122221222.

It is a super-2 number, since 2×2221222211220² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18510185034 + ... + 18510185153.

It is an arithmetic number, because the mean of its divisors is an integer number (259142591316).

Almost surely, 2^{2221222211220} is an apocalyptic number.

2221222211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221222211220 is an abundant number, since it is smaller than the sum of its proper divisors (3998199980364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2221222211220 is a wasteful number, since it uses less digits than its factorization.

2221222211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37020370199 (or 37020370197 counting only the distinct ones).

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

Adding to 2221222211220 its reverse (221122221222), we get a palindrome (2442344432442).

It can be divided in two parts, 222122 and 2211220, that added together give a palindrome (2433342).

The spelling of 2221222211220 in words is "two trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred eleven thousand, two hundred twenty".