1331102221021 has 2 divisors, whose sum is σ = 1331102221022. Its totient is φ = 1331102221020.

The previous prime is 1331102220967. The next prime is 1331102221051. The reversal of 1331102221021 is 1201222011331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1196496884025 + 134605336996 = 1093845^2 + 366886^2 .

It is an emirp because it is prime and its reverse (1201222011331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1331102221021 - 2²¹ = 1331100123869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1331102221021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331102221051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665551110510 + 665551110511.

It is an arithmetic number, because the mean of its divisors is an integer number (665551110511).

Almost surely, 2^{1331102221021} is an apocalyptic number.

It is an amenable number.

1331102221021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331102221021 is an equidigital number, since it uses as much as digits as its factorization.

1331102221021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1331102221021 its reverse (1201222011331), we get a palindrome (2532324232352).

The spelling of 1331102221021 in words is "one trillion, three hundred thirty-one billion, one hundred two million, two hundred twenty-one thousand, twenty-one".