1021221220222 has 8 divisors (see below), whose sum is σ = 1750664948976. Its totient is φ = 437666237232.

The previous prime is 1021221220213. The next prime is 1021221220223. The reversal of 1021221220222 is 2220221221201.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1021221220222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021221220223) 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, 36472186423 + ... + 36472186450.

It is an arithmetic number, because the mean of its divisors is an integer number (218833118622).

Almost surely, 2^{1021221220222} is an apocalyptic number.

1021221220222 is a deficient number, since it is larger than the sum of its proper divisors (729443728754).

1021221220222 is an equidigital number, since it uses as much as digits as its factorization.

1021221220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72944372882.

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

Adding to 1021221220222 its reverse (2220221221201), we get a palindrome (3241442441423).

The spelling of 1021221220222 in words is "one trillion, twenty-one billion, two hundred twenty-one million, two hundred twenty thousand, two hundred twenty-two".