1222021222221 has 8 divisors (see below), whose sum is σ = 1632990499200. Its totient is φ = 812866380032.

The previous prime is 1222021222211. The next prime is 1222021222223. The reversal of 1222021222221 is 1222221202221.

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 1222021222221 - 2³⁹ = 672265408333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222021222223) by changing a digit.

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, 453607125 + ... + 453609818.

It is an arithmetic number, because the mean of its divisors is an integer number (204123812400).

Almost surely, 2^{1222021222221} is an apocalyptic number.

It is an amenable number.

1222021222221 is a deficient number, since it is larger than the sum of its proper divisors (410969276979).

1222021222221 is an equidigital number, since it uses as much as digits as its factorization.

1222021222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907217395.

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

Adding to 1222021222221 its reverse (1222221202221), we get a palindrome (2444242424442).

The spelling of 1222021222221 in words is "one trillion, two hundred twenty-two billion, twenty-one million, two hundred twenty-two thousand, two hundred twenty-one".