1221231000224 has 24 divisors (see below), whose sum is σ = 2434732695360. Its totient is φ = 602886188736.

The previous prime is 1221231000193. The next prime is 1221231000263. The reversal of 1221231000224 is 4220001321221.

It is a super-2 number, since 2×1221231000224² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221231000196 and 1221231000205.

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, 241538414 + ... + 241543469.

It is an arithmetic number, because the mean of its divisors is an integer number (101447195640).

Almost surely, 2^{1221231000224} is an apocalyptic number.

It is an amenable number.

1221231000224 is a deficient number, since it is larger than the sum of its proper divisors (1213501695136).

1221231000224 is an equidigital number, since it uses as much as digits as its factorization.

1221231000224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483081972 (or 483081964 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 1221231000224 its reverse (4220001321221), we get a palindrome (5441232321445).

The spelling of 1221231000224 in words is "one trillion, two hundred twenty-one billion, two hundred thirty-one million, two hundred twenty-four", and thus it is an aban number.