212412311 has 4 divisors (see below), whose sum is σ = 215582712. Its totient is φ = 209241912.

The previous prime is 212412293. The next prime is 212412313. The reversal of 212412311 is 113214212.

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 212412311 - 2⁶ = 212412247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212412311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212412313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1585100 + ... + 1585233.

It is an arithmetic number, because the mean of its divisors is an integer number (53895678).

Almost surely, 2^212412311 is an apocalyptic number.

212412311 is a deficient number, since it is larger than the sum of its proper divisors (3170401).

212412311 is an equidigital number, since it uses as much as digits as its factorization.

212412311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3170400.

The product of its digits is 96, while the sum is 17.

The square root of 212412311 is about 14574.3717188769. The cubic root of 212412311 is about 596.6595020449.

Adding to 212412311 its reverse (113214212), we get a palindrome (325626523).

The spelling of 212412311 in words is "two hundred twelve million, four hundred twelve thousand, three hundred eleven".