1321223220224 has 44 divisors (see below), whose sum is σ = 2649595024824. Its totient is φ = 658500870144.

The previous prime is 1321223220211. The next prime is 1321223220299. The reversal of 1321223220224 is 4220223221231.

It is a super-2 number, since 2×1321223220224² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1321223220193 and 1321223220202.

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 3 ways as a sum of consecutive naturals, for example, 1740602 + ... + 2381625.

It is an arithmetic number, because the mean of its divisors is an integer number (60218068746).

Almost surely, 2^{1321223220224} is an apocalyptic number.

It is an amenable number.

1321223220224 is an abundant number, since it is smaller than the sum of its proper divisors (1328371804600).

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

1321223220224 is an equidigital number, since it uses as much as digits as its factorization.

1321223220224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4122560 (or 4122542 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 1321223220224 its reverse (4220223221231), we get a palindrome (5541446441455).

The spelling of 1321223220224 in words is "one trillion, three hundred twenty-one billion, two hundred twenty-three million, two hundred twenty thousand, two hundred twenty-four".