211011601 has 2 divisors, whose sum is σ = 211011602. Its totient is φ = 211011600.

The previous prime is 211011583. The next prime is 211011617. The reversal of 211011601 is 106110112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210946576 + 65025 = 14524^2 + 255^2 .

It is a cyclic number.

It is not a de Polignac number, because 211011601 - 2¹⁹ = 210487313 is a prime.

It is not a weakly prime, because it can be changed into another prime (211011641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105505800 + 105505801.

It is an arithmetic number, because the mean of its divisors is an integer number (105505801).

Almost surely, 2^211011601 is an apocalyptic number.

It is an amenable number.

211011601 is a deficient number, since it is larger than the sum of its proper divisors (1).

211011601 is an equidigital number, since it uses as much as digits as its factorization.

211011601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 211011601 is about 14526.2383637334. The cubic root of 211011601 is about 595.3450918120.

Adding to 211011601 its reverse (106110112), we get a palindrome (317121713).

The spelling of 211011601 in words is "two hundred eleven million, eleven thousand, six hundred one".