1222220000221 has 32 divisors (see below), whose sum is σ = 1395647003520. Its totient is φ = 1060127712000.

The previous prime is 1222220000219. The next prime is 1222220000293. The reversal of 1222220000221 is 1220000222221.

It is not a de Polignac number, because 1222220000221 - 2¹ = 1222220000219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222220000195 and 1222220000204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222220000201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16814271 + ... + 16886803.

It is an arithmetic number, because the mean of its divisors is an integer number (43613968860).

Almost surely, 2^{1222220000221} is an apocalyptic number.

1222220000221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1222220000221 is a deficient number, since it is larger than the sum of its proper divisors (173427003299).

1222220000221 is a wasteful number, since it uses less digits than its factorization.

1222220000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73197.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 1222220000221 its reverse (1220000222221), we get a palindrome (2442220222442).

The spelling of 1222220000221 in words is "one trillion, two hundred twenty-two billion, two hundred twenty million, two hundred twenty-one", and thus it is an aban number.