11011212121057 has 2 divisors, whose sum is σ = 11011212121058. Its totient is φ = 11011212121056.

The previous prime is 11011212121051. The next prime is 11011212121061. The reversal of 11011212121057 is 75012121211011.

11011212121057 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., 10505383922401 + 505828198656 = 3241201^2 + 711216^2 .

It is a cyclic number.

It is not a de Polignac number, because 11011212121057 - 2⁷ = 11011212120929 is a prime.

It is not a weakly prime, because it can be changed into another prime (11011212121051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505606060528 + 5505606060529.

It is an arithmetic number, because the mean of its divisors is an integer number (5505606060529).

Almost surely, 2^{11011212121057} is an apocalyptic number.

It is an amenable number.

11011212121057 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011212121057 is an equidigital number, since it uses as much as digits as its factorization.

11011212121057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 25.

Adding to 11011212121057 its reverse (75012121211011), we get a palindrome (86023333332068).

The spelling of 11011212121057 in words is "eleven trillion, eleven billion, two hundred twelve million, one hundred twenty-one thousand, fifty-seven".