1242220550412 has 12 divisors (see below), whose sum is σ = 2898514617656. Its totient is φ = 414073516800.

The previous prime is 1242220550327. The next prime is 1242220550413. The reversal of 1242220550412 is 2140550222421.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1242220550412² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1242220550412.

It is not an unprimeable number, because it can be changed into a prime (1242220550413) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 51759189589 + ... + 51759189612.

Almost surely, 2^{1242220550412} is an apocalyptic number.

1242220550412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1242220550412 is an abundant number, since it is smaller than the sum of its proper divisors (1656294067244).

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

1242220550412 is a wasteful number, since it uses less digits than its factorization.

1242220550412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103518379208 (or 103518379206 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 1242220550412 its reverse (2140550222421), we get a palindrome (3382770772833).

The spelling of 1242220550412 in words is "one trillion, two hundred forty-two billion, two hundred twenty million, five hundred fifty thousand, four hundred twelve".