1222112212221 has 8 divisors (see below), whose sum is σ = 1629488802240. Its totient is φ = 814738548512.

The previous prime is 1222112212219. The next prime is 1222112212229. The reversal of 1222112212221 is 1222122112221.

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 1222112212221 - 2¹ = 1222112212219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222112212229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 577561 + ... + 1666673.

It is an arithmetic number, because the mean of its divisors is an integer number (203686100280).

Almost surely, 2^{1222112212221} is an apocalyptic number.

It is an amenable number.

1222112212221 is a deficient number, since it is larger than the sum of its proper divisors (407376590019).

1222112212221 is a wasteful number, since it uses less digits than its factorization.

1222112212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463155.

The product of its digits is 256, while the sum is 21.

Adding to 1222112212221 its reverse (1222122112221), we get a palindrome (2444234324442).

The spelling of 1222112212221 in words is "one trillion, two hundred twenty-two billion, one hundred twelve million, two hundred twelve thousand, two hundred twenty-one".