1221434323244 has 6 divisors (see below), whose sum is σ = 2137510065684. Its totient is φ = 610717161620.

The previous prime is 1221434323183. The next prime is 1221434323259. The reversal of 1221434323244 is 4423234341221.

It is a happy number.

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 as a sum of consecutive naturals, namely, 152679290402 + ... + 152679290409.

It is an arithmetic number, because the mean of its divisors is an integer number (356251677614).

Almost surely, 2^{1221434323244} is an apocalyptic number.

It is an amenable number.

1221434323244 is a deficient number, since it is larger than the sum of its proper divisors (916075742440).

1221434323244 is a wasteful number, since it uses less digits than its factorization.

1221434323244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305358580815 (or 305358580813 counting only the distinct ones).

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

Adding to 1221434323244 its reverse (4423234341221), we get a palindrome (5644668664465).

The spelling of 1221434323244 in words is "one trillion, two hundred twenty-one billion, four hundred thirty-four million, three hundred twenty-three thousand, two hundred forty-four".