211143137857 has 2 divisors, whose sum is σ = 211143137858. Its totient is φ = 211143137856.

The previous prime is 211143137783. The next prime is 211143137879. The reversal of 211143137857 is 758731341112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117207630736 + 93935507121 = 342356^2 + 306489^2 .

It is a cyclic number.

It is not a de Polignac number, because 211143137857 - 2¹¹ = 211143135809 is a prime.

It is not a weakly prime, because it can be changed into another prime (211143134857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105571568928 + 105571568929.

It is an arithmetic number, because the mean of its divisors is an integer number (105571568929).

Almost surely, 2^211143137857 is an apocalyptic number.

It is an amenable number.

211143137857 is a deficient number, since it is larger than the sum of its proper divisors (1).

211143137857 is an equidigital number, since it uses as much as digits as its factorization.

211143137857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 43.

Adding to 211143137857 its reverse (758731341112), we get a palindrome (969874478969).

The spelling of 211143137857 in words is "two hundred eleven billion, one hundred forty-three million, one hundred thirty-seven thousand, eight hundred fifty-seven".