1221043144112 has 40 divisors (see below), whose sum is σ = 2583430169232. Its totient is φ = 554462841600.

The previous prime is 1221043144063. The next prime is 1221043144129. The reversal of 1221043144112 is 2114413401221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3303839 + ... + 3654782.

Almost surely, 2^{1221043144112} is an apocalyptic number.

It is an amenable number.

1221043144112 is an abundant number, since it is smaller than the sum of its proper divisors (1362387025120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221043144112 is a wasteful number, since it uses less digits than its factorization.

1221043144112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6959637 (or 6959631 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

Adding to 1221043144112 its reverse (2114413401221), we get a palindrome (3335456545333).

The spelling of 1221043144112 in words is "one trillion, two hundred twenty-one billion, forty-three million, one hundred forty-four thousand, one hundred twelve".