1220512405244 has 48 divisors (see below), whose sum is σ = 2395813321440. Its totient is φ = 539317059840.

The previous prime is 1220512405223. The next prime is 1220512405249. The reversal of 1220512405244 is 4425042150221.

It is a self number, because there is not a number n which added to its sum of digits gives 1220512405244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220512405249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2146619 + ... + 2654994.

It is an arithmetic number, because the mean of its divisors is an integer number (49912777530).

Almost surely, 2^{1220512405244} is an apocalyptic number.

It is an amenable number.

1220512405244 is a deficient number, since it is larger than the sum of its proper divisors (1175300916196).

1220512405244 is a wasteful number, since it uses less digits than its factorization.

1220512405244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4801790 (or 4801788 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 32.

Adding to 1220512405244 its reverse (4425042150221), we get a palindrome (5645554555465).

The spelling of 1220512405244 in words is "one trillion, two hundred twenty billion, five hundred twelve million, four hundred five thousand, two hundred forty-four".