1221133444024 has 32 divisors (see below), whose sum is σ = 2465798116320. Its totient is φ = 563589104256.

The previous prime is 1221133444021. The next prime is 1221133444031. The reversal of 1221133444024 is 4204443311221.

It is a happy number.

It is a super-2 number, since 2×1221133444024² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221133444021) 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 7 ways as a sum of consecutive naturals, for example, 8090997 + ... + 8240539.

It is an arithmetic number, because the mean of its divisors is an integer number (77056191135).

Almost surely, 2^{1221133444024} is an apocalyptic number.

It is an amenable number.

1221133444024 is an abundant number, since it is smaller than the sum of its proper divisors (1244664672296).

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

1221133444024 is a wasteful number, since it uses less digits than its factorization.

1221133444024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228079 (or 228075 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 1221133444024 its reverse (4204443311221), we get a palindrome (5425576755245).

The spelling of 1221133444024 in words is "one trillion, two hundred twenty-one billion, one hundred thirty-three million, four hundred forty-four thousand, twenty-four".