1221433432245 has 192 divisors, whose sum is σ = 2398694538240. Its totient is φ = 570975381504.

The previous prime is 1221433432231. The next prime is 1221433432253. The reversal of 1221433432245 is 5422343341221.

1221433432245 is a `hidden beast` number, since 1 + 2 + 214 + 3 + 3 + 432 + 2 + 4 + 5 = 666.

It is not a de Polignac number, because 1221433432245 - 2⁵ = 1221433432213 is a prime.

It is a congruent number.

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 191 ways as a sum of consecutive naturals, for example, 158069572 + ... + 158077298.

It is an arithmetic number, because the mean of its divisors is an integer number (12493200720).

Almost surely, 2^{1221433432245} is an apocalyptic number.

1221433432245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1221433432245 is a deficient number, since it is larger than the sum of its proper divisors (1177261105995).

1221433432245 is a wasteful number, since it uses less digits than its factorization.

1221433432245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7964 (or 7961 counting only the distinct ones).

The product of its digits is 138240, while the sum is 36.

Adding to 1221433432245 its reverse (5422343341221), we get a palindrome (6643776773466).

The spelling of 1221433432245 in words is "one trillion, two hundred twenty-one billion, four hundred thirty-three million, four hundred thirty-two thousand, two hundred forty-five".