1321411421421 has 72 divisors (see below), whose sum is σ = 2531780052984. Its totient is φ = 656007690240.

The previous prime is 1321411421411. The next prime is 1321411421467. The reversal of 1321411421421 is 1241241141231.

1321411421421 is a `hidden beast` number, since 1 + 3 + 214 + 1 + 1 + 4 + 21 + 421 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7201389321 + 1314210032100 = 84861^2 + 1146390^2 .

It is not a de Polignac number, because 1321411421421 - 2¹¹ = 1321411419373 is a prime.

It is a super-2 number, since 2×1321411421421² (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 (1321411421411) 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 71 ways as a sum of consecutive naturals, for example, 6681720 + ... + 6876641.

It is an arithmetic number, because the mean of its divisors is an integer number (35163611847).

Almost surely, 2^{1321411421421} is an apocalyptic number.

It is an amenable number.

1321411421421 is a deficient number, since it is larger than the sum of its proper divisors (1210368631563).

1321411421421 is a wasteful number, since it uses less digits than its factorization.

1321411421421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13558411 (or 13558401 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

Adding to 1321411421421 its reverse (1241241141231), we get a palindrome (2562652562652).

The spelling of 1321411421421 in words is "one trillion, three hundred twenty-one billion, four hundred eleven million, four hundred twenty-one thousand, four hundred twenty-one".