1221224000412 has 48 divisors (see below), whose sum is σ = 3174534548640. Its totient is φ = 362803945728.

The previous prime is 1221224000393. The next prime is 1221224000461. The reversal of 1221224000412 is 2140004221221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134967183 + ... + 134976230.

It is an arithmetic number, because the mean of its divisors is an integer number (66136136430).

Almost surely, 2^{1221224000412} is an apocalyptic number.

1221224000412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1221224000412 is an abundant number, since it is smaller than the sum of its proper divisors (1953310548228).

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

1221224000412 is a wasteful number, since it uses less digits than its factorization.

1221224000412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269943462 (or 269943460 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 1221224000412 its reverse (2140004221221), we get a palindrome (3361228221633).

The spelling of 1221224000412 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-four million, four hundred twelve", and thus it is an aban number.