11521214567 has 2 divisors, whose sum is σ = 11521214568. Its totient is φ = 11521214566.

The previous prime is 11521214543. The next prime is 11521214581. The reversal of 11521214567 is 76541212511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11521214567 - 2²⁶ = 11454105703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11521214587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5760607283 + 5760607284.

It is an arithmetic number, because the mean of its divisors is an integer number (5760607284).

Almost surely, 2^11521214567 is an apocalyptic number.

11521214567 is a deficient number, since it is larger than the sum of its proper divisors (1).

11521214567 is an equidigital number, since it uses as much as digits as its factorization.

11521214567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 35.

The spelling of 11521214567 in words is "eleven billion, five hundred twenty-one million, two hundred fourteen thousand, five hundred sixty-seven".