212142311 has 2 divisors, whose sum is σ = 212142312. Its totient is φ = 212142310.

The previous prime is 212142299. The next prime is 212142313. The reversal of 212142311 is 113241212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212142311 - 2⁶ = 212142247 is a prime.

Together with 212142313, 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 212142311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212142313) 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, 106071155 + 106071156.

It is an arithmetic number, because the mean of its divisors is an integer number (106071156).

Almost surely, 2^212142311 is an apocalyptic number.

212142311 is a deficient number, since it is larger than the sum of its proper divisors (1).

212142311 is an equidigital number, since it uses as much as digits as its factorization.

212142311 is an odious number, because the sum of its binary digits is odd.

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

The square root of 212142311 is about 14565.1059385093. The cubic root of 212142311 is about 596.4065876839.

Adding to 212142311 its reverse (113241212), we get a palindrome (325383523).

The spelling of 212142311 in words is "two hundred twelve million, one hundred forty-two thousand, three hundred eleven".