212420135 has 4 divisors (see below), whose sum is σ = 254904168. Its totient is φ = 169936104.

The previous prime is 212420081. The next prime is 212420141. The reversal of 212420135 is 531024212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212420135 - 2¹⁰ = 212419111 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 3 ways as a sum of consecutive naturals, for example, 21242009 + ... + 21242018.

It is an arithmetic number, because the mean of its divisors is an integer number (63726042).

Almost surely, 2^212420135 is an apocalyptic number.

212420135 is a deficient number, since it is larger than the sum of its proper divisors (42484033).

212420135 is an equidigital number, since it uses as much as digits as its factorization.

212420135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42484032.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 212420135 is about 14574.6401327786. The cubic root of 212420135 is about 596.6668277450. Note that the first 3 decimals are identical.

Adding to 212420135 its reverse (531024212), we get a palindrome (743444347).

The spelling of 212420135 in words is "two hundred twelve million, four hundred twenty thousand, one hundred thirty-five".