212113611 has 12 divisors (see below), whose sum is σ = 309830040. Its totient is φ = 139819680.

The previous prime is 212113609. The next prime is 212113619. The reversal of 212113611 is 116311212.

212113611 is a `hidden beast` number, since 21 + 21 + 13 + 611 = 666.

It is not a de Polignac number, because 212113611 - 2¹ = 212113609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212113619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131605 + ... + 133206.

It is an arithmetic number, because the mean of its divisors is an integer number (25819170).

Almost surely, 2^212113611 is an apocalyptic number.

212113611 is a deficient number, since it is larger than the sum of its proper divisors (97716429).

212113611 is a wasteful number, since it uses less digits than its factorization.

212113611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264906 (or 264903 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 212113611 is about 14564.1206737654. The cubic root of 212113611 is about 596.3796912090.

Adding to 212113611 its reverse (116311212), we get a palindrome (328424823).

The spelling of 212113611 in words is "two hundred twelve million, one hundred thirteen thousand, six hundred eleven".