11012121597557 has 2 divisors, whose sum is σ = 11012121597558. Its totient is φ = 11012121597556.

The previous prime is 11012121597497. The next prime is 11012121597559. The reversal of 11012121597557 is 75579512121011.

11012121597557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8608508568676 + 2403613028881 = 2934026^2 + 1550359^2 .

It is a cyclic number.

It is not a de Polignac number, because 11012121597557 - 2²⁰ = 11012120548981 is a prime.

Together with 11012121597559, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11012121597559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5506060798778 + 5506060798779.

It is an arithmetic number, because the mean of its divisors is an integer number (5506060798779).

Almost surely, 2^{11012121597557} is an apocalyptic number.

It is an amenable number.

11012121597557 is a deficient number, since it is larger than the sum of its proper divisors (1).

11012121597557 is an equidigital number, since it uses as much as digits as its factorization.

11012121597557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 220500, while the sum is 47.

The spelling of 11012121597557 in words is "eleven trillion, twelve billion, one hundred twenty-one million, five hundred ninety-seven thousand, five hundred fifty-seven".