212135811 has 8 divisors (see below), whose sum is σ = 283659600. Its totient is φ = 141017952.

The previous prime is 212135797. The next prime is 212135827. The reversal of 212135811 is 118531212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212135811 - 2¹¹ = 212133763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212135881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100260 + ... + 102353.

It is an arithmetic number, because the mean of its divisors is an integer number (35457450).

Almost surely, 2^212135811 is an apocalyptic number.

212135811 is a deficient number, since it is larger than the sum of its proper divisors (71523789).

212135811 is a wasteful number, since it uses less digits than its factorization.

212135811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202965.

The product of its digits is 480, while the sum is 24.

The square root of 212135811 is about 14564.8828007643. The cubic root of 212135811 is about 596.4004963603.

The spelling of 212135811 in words is "two hundred twelve million, one hundred thirty-five thousand, eight hundred eleven".