1222221121012 has 6 divisors (see below), whose sum is σ = 2138886961778. Its totient is φ = 611110560504.

The previous prime is 1222221120941. The next prime is 1222221121061. The reversal of 1222221121012 is 2101211222221.

It can be written as a sum of positive squares in only one way, i.e., 1215206388496 + 7014732516 = 1102364^2 + 83754^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152777640123 + ... + 152777640130.

Almost surely, 2^{1222221121012} is an apocalyptic number.

It is an amenable number.

1222221121012 is a deficient number, since it is larger than the sum of its proper divisors (916665840766).

1222221121012 is a wasteful number, since it uses less digits than its factorization.

1222221121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305555280257 (or 305555280255 counting only the distinct ones).

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

Adding to 1222221121012 its reverse (2101211222221), we get a palindrome (3323432343233).

The spelling of 1222221121012 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-one million, one hundred twenty-one thousand, twelve".