1221433432244 has 12 divisors (see below), whose sum is σ = 2137644236868. Its totient is φ = 610677936000.

The previous prime is 1221433432231. The next prime is 1221433432253. The reversal of 1221433432244 is 4422343341221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 651426552100 + 570006880144 = 807110^2 + 754988^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9624107 + ... + 9750194.

It is an arithmetic number, because the mean of its divisors is an integer number (178137019739).

Almost surely, 2^{1221433432244} is an apocalyptic number.

It is an amenable number.

1221433432244 is a deficient number, since it is larger than the sum of its proper divisors (916210804624).

1221433432244 is a wasteful number, since it uses less digits than its factorization.

1221433432244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19390066 (or 19390064 counting only the distinct ones).

The product of its digits is 110592, while the sum is 35.

Adding to 1221433432244 its reverse (4422343341221), we get a palindrome (5643776773465).

The spelling of 1221433432244 in words is "one trillion, two hundred twenty-one billion, four hundred thirty-three million, four hundred thirty-two thousand, two hundred forty-four".