1221433201324 has 12 divisors (see below), whose sum is σ = 2442866402704. Its totient is φ = 523471371984.

The previous prime is 1221433201267. The next prime is 1221433201367. The reversal of 1221433201324 is 4231023341221.

1221433201324 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 43622614333 = 1221433201324 / (1 + 2 + 2 + 1 + 4 + 3 + 3 + 2 + 0 + 1 + 3 + 2 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 1221433201292 and 1221433201301.

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 3 ways as a sum of consecutive naturals, for example, 21811307139 + ... + 21811307194.

Almost surely, 2^{1221433201324} is an apocalyptic number.

1221433201324 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1221433201324 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1221433201324 is a wasteful number, since it uses less digits than its factorization.

1221433201324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43622614344 (or 43622614342 counting only the distinct ones).

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

Adding to 1221433201324 its reverse (4231023341221), we get a palindrome (5452456542545).

The spelling of 1221433201324 in words is "one trillion, two hundred twenty-one billion, four hundred thirty-three million, two hundred one thousand, three hundred twenty-four".