211148611 has 2 divisors, whose sum is σ = 211148612. Its totient is φ = 211148610.

The previous prime is 211148573. The next prime is 211148629. The reversal of 211148611 is 116841112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211148611 is a prime.

It is not a weakly prime, because it can be changed into another prime (211148411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105574305 + 105574306.

It is an arithmetic number, because the mean of its divisors is an integer number (105574306).

Almost surely, 2^211148611 is an apocalyptic number.

211148611 is a deficient number, since it is larger than the sum of its proper divisors (1).

211148611 is an equidigital number, since it uses as much as digits as its factorization.

211148611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 25.

The square root of 211148611 is about 14530.9535475137. The cubic root of 211148611 is about 595.4739166142.

Adding to 211148611 its reverse (116841112), we get a palindrome (327989723).

The spelling of 211148611 in words is "two hundred eleven million, one hundred forty-eight thousand, six hundred eleven".