1221333143244 has 48 divisors (see below), whose sum is σ = 2865969200640. Its totient is φ = 404798627520.

The previous prime is 1221333143243. The next prime is 1221333143311. The reversal of 1221333143244 is 4423413331221.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1221333143243) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 15074547 + ... + 15155349.

It is an arithmetic number, because the mean of its divisors is an integer number (59707691680).

Almost surely, 2^{1221333143244} is an apocalyptic number.

It is an amenable number.

1221333143244 is an abundant number, since it is smaller than the sum of its proper divisors (1644636057396).

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

1221333143244 is a wasteful number, since it uses less digits than its factorization.

1221333143244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87950 (or 87948 counting only the distinct ones).

The product of its digits is 41472, while the sum is 33.

Adding to 1221333143244 its reverse (4423413331221), we get a palindrome (5644746474465).

The spelling of 1221333143244 in words is "one trillion, two hundred twenty-one billion, three hundred thirty-three million, one hundred forty-three thousand, two hundred forty-four".