11211020057 has 2 divisors, whose sum is σ = 11211020058. Its totient is φ = 11211020056.

The previous prime is 11211020003. The next prime is 11211020081. The reversal of 11211020057 is 75002011211.

It is a happy number.

11211020057 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., 9010565776 + 2200454281 = 94924^2 + 46909^2 .

It is a cyclic number.

It is not a de Polignac number, because 11211020057 - 2¹² = 11211015961 is a prime.

It is not a weakly prime, because it can be changed into another prime (11211020257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605510028 + 5605510029.

It is an arithmetic number, because the mean of its divisors is an integer number (5605510029).

Almost surely, 2^11211020057 is an apocalyptic number.

It is an amenable number.

11211020057 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211020057 is an equidigital number, since it uses as much as digits as its factorization.

11211020057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 140, while the sum is 20.

Adding to 11211020057 its reverse (75002011211), we get a palindrome (86213031268).

The spelling of 11211020057 in words is "eleven billion, two hundred eleven million, twenty thousand, fifty-seven".