1221103233424 has 40 divisors (see below), whose sum is σ = 2402513338680. Its totient is φ = 601166592000.

The previous prime is 1221103233409. The next prime is 1221103233433. The reversal of 1221103233424 is 4243323011221.

It can be written as a sum of positive squares in 4 ways, for example, as 58225690000 + 1162877543424 = 241300^2 + 1078368^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1221103233392 and 1221103233401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1794889 + ... + 2379880.

It is an arithmetic number, because the mean of its divisors is an integer number (60062833467).

Almost surely, 2^{1221103233424} is an apocalyptic number.

It is an amenable number.

1221103233424 is a deficient number, since it is larger than the sum of its proper divisors (1181410105256).

1221103233424 is a wasteful number, since it uses less digits than its factorization.

1221103233424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4175059 (or 4175053 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 1221103233424 its reverse (4243323011221), we get a palindrome (5464426244645).

The spelling of 1221103233424 in words is "one trillion, two hundred twenty-one billion, one hundred three million, two hundred thirty-three thousand, four hundred twenty-four".