212403311 has 2 divisors, whose sum is σ = 212403312. Its totient is φ = 212403310.

The previous prime is 212403307. The next prime is 212403313. The reversal of 212403311 is 113304212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212403311 - 2² = 212403307 is a prime.

Together with 212403313, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212403311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212403313) by changing a digit.

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 as a sum of consecutive naturals, namely, 106201655 + 106201656.

It is an arithmetic number, because the mean of its divisors is an integer number (106201656).

Almost surely, 2^212403311 is an apocalyptic number.

212403311 is a deficient number, since it is larger than the sum of its proper divisors (1).

212403311 is an equidigital number, since it uses as much as digits as its factorization.

212403311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 212403311 is about 14574.0629544407. The cubic root of 212403311 is about 596.6510750202.

Adding to 212403311 its reverse (113304212), we get a palindrome (325707523).

Subtracting from 212403311 its reverse (113304212), we obtain a palindrome (99099099).

The spelling of 212403311 in words is "two hundred twelve million, four hundred three thousand, three hundred eleven".