1222112201221 has 32 divisors (see below), whose sum is σ = 1322716262400. Its totient is φ = 1125020682240.

The previous prime is 1222112201213. The next prime is 1222112201243. The reversal of 1222112201221 is 1221022112221.

It is a cyclic number.

It is not a de Polignac number, because 1222112201221 - 2³ = 1222112201213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222112201201) 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, 65277900 + ... + 65296618.

It is an arithmetic number, because the mean of its divisors is an integer number (41334883200).

Almost surely, 2^{1222112201221} is an apocalyptic number.

It is an amenable number.

1222112201221 is a deficient number, since it is larger than the sum of its proper divisors (100604061179).

1222112201221 is a wasteful number, since it uses less digits than its factorization.

1222112201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19269.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1222112201221 its reverse (1221022112221), we get a palindrome (2443134313442).

The spelling of 1222112201221 in words is "one trillion, two hundred twenty-two billion, one hundred twelve million, two hundred one thousand, two hundred twenty-one".