11521214543 has 2 divisors, whose sum is σ = 11521214544. Its totient is φ = 11521214542.

The previous prime is 11521214521. The next prime is 11521214567. The reversal of 11521214543 is 34541212511.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11521214543 - 2²⁶ = 11454105679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11521214513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5760607271 + 5760607272.

It is an arithmetic number, because the mean of its divisors is an integer number (5760607272).

Almost surely, 2^11521214543 is an apocalyptic number.

11521214543 is a deficient number, since it is larger than the sum of its proper divisors (1).

11521214543 is an equidigital number, since it uses as much as digits as its factorization.

11521214543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4800, while the sum is 29.

The spelling of 11521214543 in words is "eleven billion, five hundred twenty-one million, two hundred fourteen thousand, five hundred forty-three".