11543321460821 has 2 divisors, whose sum is σ = 11543321460822. Its totient is φ = 11543321460820.

The previous prime is 11543321460799. The next prime is 11543321460901. The reversal of 11543321460821 is 12806412334511.

11543321460821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10456744548721 + 1086576912100 = 3233689^2 + 1042390^2 .

It is a cyclic number.

It is not a de Polignac number, because 11543321460821 - 2¹⁴ = 11543321444437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11543321420821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5771660730410 + 5771660730411.

It is an arithmetic number, because the mean of its divisors is an integer number (5771660730411).

Almost surely, 2^{11543321460821} is an apocalyptic number.

It is an amenable number.

11543321460821 is a deficient number, since it is larger than the sum of its proper divisors (1).

11543321460821 is an equidigital number, since it uses as much as digits as its factorization.

11543321460821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 11543321460821 in words is "eleven trillion, five hundred forty-three billion, three hundred twenty-one million, four hundred sixty thousand, eight hundred twenty-one".