212312135 has 8 divisors (see below), whose sum is σ = 291170976. Its totient is φ = 145585440.

The previous prime is 212312129. The next prime is 212312141. The reversal of 212312135 is 531213212.

It is an interprime number because it is at equal distance from previous prime (212312129) and next prime (212312141).

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

It is not a de Polignac number, because 212312135 - 2⁴ = 212312119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3032996 + ... + 3033065.

It is an arithmetic number, because the mean of its divisors is an integer number (36396372).

Almost surely, 2^212312135 is an apocalyptic number.

212312135 is a deficient number, since it is larger than the sum of its proper divisors (78858841).

212312135 is an equidigital number, since it uses as much as digits as its factorization.

212312135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6066073.

The product of its digits is 360, while the sum is 20.

The square root of 212312135 is about 14570.9345959688. The cubic root of 212312135 is about 596.5656902179.

Adding to 212312135 its reverse (531213212), we get a palindrome (743525347).

The spelling of 212312135 in words is "two hundred twelve million, three hundred twelve thousand, one hundred thirty-five".