212123143 has 2 divisors, whose sum is σ = 212123144. Its totient is φ = 212123142.

The previous prime is 212123117. The next prime is 212123159. The reversal of 212123143 is 341321212.

It is a happy number.

212123143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212123143 - 2¹³ = 212114951 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212123143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212123243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106061571 + 106061572.

It is an arithmetic number, because the mean of its divisors is an integer number (106061572).

Almost surely, 2^212123143 is an apocalyptic number.

212123143 is a deficient number, since it is larger than the sum of its proper divisors (1).

212123143 is an equidigital number, since it uses as much as digits as its factorization.

212123143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 19.

The square root of 212123143 is about 14564.4479126399. The cubic root of 212123143 is about 596.3886244815.

Adding to 212123143 its reverse (341321212), we get a palindrome (553444355).

The spelling of 212123143 in words is "two hundred twelve million, one hundred twenty-three thousand, one hundred forty-three".