1222112221012 has 12 divisors (see below), whose sum is σ = 2139012762516. Its totient is φ = 610965717440.

The previous prime is 1222112220997. The next prime is 1222112221013. The reversal of 1222112221012 is 2101222112221.

It can be written as a sum of positive squares in 2 ways, for example, as 1151273204676 + 70839016336 = 1072974^2 + 266156^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222112221013) 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, 22567843 + ... + 22621930.

It is an arithmetic number, because the mean of its divisors is an integer number (178251063543).

Almost surely, 2^{1222112221012} is an apocalyptic number.

It is an amenable number.

1222112221012 is a deficient number, since it is larger than the sum of its proper divisors (916900541504).

1222112221012 is a wasteful number, since it uses less digits than its factorization.

1222112221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45196538 (or 45196536 counting only the distinct ones).

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

Adding to 1222112221012 its reverse (2101222112221), we get a palindrome (3323334333233).

The spelling of 1222112221012 in words is "one trillion, two hundred twenty-two billion, one hundred twelve million, two hundred twenty-one thousand, twelve".