1331102221028 has 12 divisors (see below), whose sum is σ = 2330722308012. Its totient is φ = 665181561600.

The previous prime is 1331102221021. The next prime is 1331102221051. The reversal of 1331102221028 is 8201222011331.

It can be written as a sum of positive squares in 2 ways, for example, as 79997334244 + 1251104886784 = 282838^2 + 1118528^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1331102220988 and 1331102221006.

It is not an unprimeable number, because it can be changed into a prime (1331102221021) 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 3 ways as a sum of consecutive naturals, for example, 92379125 + ... + 92393532.

It is an arithmetic number, because the mean of its divisors is an integer number (194226859001).

Almost surely, 2^{1331102221028} is an apocalyptic number.

It is an amenable number.

1331102221028 is a deficient number, since it is larger than the sum of its proper divisors (999620086984).

1331102221028 is a wasteful number, since it uses less digits than its factorization.

1331102221028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184774462 (or 184774460 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

Adding to 1331102221028 its reverse (8201222011331), we get a palindrome (9532324232359).

The spelling of 1331102221028 in words is "one trillion, three hundred thirty-one billion, one hundred two million, two hundred twenty-one thousand, twenty-eight".