212136111 has 32 divisors (see below), whose sum is σ = 345738240. Its totient is φ = 128545560.

The previous prime is 212136053. The next prime is 212136139. The reversal of 212136111 is 111631212.

It is not a de Polignac number, because 212136111 - 2⁷ = 212135983 is a prime.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212136191) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32986 + ... + 38888.

It is an arithmetic number, because the mean of its divisors is an integer number (10804320).

Almost surely, 2^212136111 is an apocalyptic number.

212136111 is a deficient number, since it is larger than the sum of its proper divisors (133602129).

212136111 is an equidigital number, since it uses as much as digits as its factorization.

212136111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5945 (or 5917 counting only the distinct ones).

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

The square root of 212136111 is about 14564.8930995047. The cubic root of 212136111 is about 596.4007775010.

Adding to 212136111 its reverse (111631212), we get a palindrome (323767323).

The spelling of 212136111 in words is "two hundred twelve million, one hundred thirty-six thousand, one hundred eleven".