211020011057 has 2 divisors, whose sum is σ = 211020011058. Its totient is φ = 211020011056.

The previous prime is 211020011039. The next prime is 211020011113. The reversal of 211020011057 is 750110020112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112222320016 + 98797691041 = 334996^2 + 314321^2 .

It is a cyclic number.

It is not a de Polignac number, because 211020011057 - 2⁸ = 211020010801 is a prime.

It is not a weakly prime, because it can be changed into another prime (211020019057) 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, 105510005528 + 105510005529.

It is an arithmetic number, because the mean of its divisors is an integer number (105510005529).

Almost surely, 2^211020011057 is an apocalyptic number.

It is an amenable number.

211020011057 is a deficient number, since it is larger than the sum of its proper divisors (1).

211020011057 is an equidigital number, since it uses as much as digits as its factorization.

211020011057 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 211020011057 its reverse (750110020112), we get a palindrome (961130031169).

The spelling of 211020011057 in words is "two hundred eleven billion, twenty million, eleven thousand, fifty-seven".