1212221361244 has 24 divisors (see below), whose sum is σ = 2233114083200. Its totient is φ = 574190901360.

The previous prime is 1212221361217. The next prime is 1212221361259. The reversal of 1212221361244 is 4421631222121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2163577 + ... + 2665615.

Almost surely, 2^{1212221361244} is an apocalyptic number.

It is an amenable number.

1212221361244 is a deficient number, since it is larger than the sum of its proper divisors (1020892721956).

1212221361244 is a wasteful number, since it uses less digits than its factorization.

1212221361244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533833 (or 533831 counting only the distinct ones).

The product of its digits is 9216, while the sum is 31.

Adding to 1212221361244 its reverse (4421631222121), we get a palindrome (5633852583365).

The spelling of 1212221361244 in words is "one trillion, two hundred twelve billion, two hundred twenty-one million, three hundred sixty-one thousand, two hundred forty-four".