211021011137 has 2 divisors, whose sum is σ = 211021011138. Its totient is φ = 211021011136.

The previous prime is 211021011079. The next prime is 211021011151. The reversal of 211021011137 is 731110120112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118063708816 + 92957302321 = 343604^2 + 304889^2 .

It is a cyclic number.

It is not a de Polignac number, because 211021011137 - 2⁸ = 211021010881 is a prime.

It is not a weakly prime, because it can be changed into another prime (211021011637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105510505568 + 105510505569.

It is an arithmetic number, because the mean of its divisors is an integer number (105510505569).

Almost surely, 2^211021011137 is an apocalyptic number.

It is an amenable number.

211021011137 is a deficient number, since it is larger than the sum of its proper divisors (1).

211021011137 is an equidigital number, since it uses as much as digits as its factorization.

211021011137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 20.

Adding to 211021011137 its reverse (731110120112), we get a palindrome (942131131249).

The spelling of 211021011137 in words is "two hundred eleven billion, twenty-one million, eleven thousand, one hundred thirty-seven".