11521075555867 has 2 divisors, whose sum is σ = 11521075555868. Its totient is φ = 11521075555866.

The previous prime is 11521075555723. The next prime is 11521075555967. The reversal of 11521075555867 is 76855557012511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11521075555867 - 2¹⁹ = 11521075031579 is a prime.

It is a super-2 number, since 2×11521075555867² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11521075555567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5760537777933 + 5760537777934.

It is an arithmetic number, because the mean of its divisors is an integer number (5760537777934).

Almost surely, 2^{11521075555867} is an apocalyptic number.

11521075555867 is a deficient number, since it is larger than the sum of its proper divisors (1).

11521075555867 is an equidigital number, since it uses as much as digits as its factorization.

11521075555867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14700000, while the sum is 58.

The spelling of 11521075555867 in words is "eleven trillion, five hundred twenty-one billion, seventy-five million, five hundred fifty-five thousand, eight hundred sixty-seven".