212001239 has 2 divisors, whose sum is σ = 212001240. Its totient is φ = 212001238.

The previous prime is 212001233. The next prime is 212001253. The reversal of 212001239 is 932100212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212001239 is a prime.

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 212001239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212001233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106000619 + 106000620.

It is an arithmetic number, because the mean of its divisors is an integer number (106000620).

Almost surely, 2^212001239 is an apocalyptic number.

212001239 is a deficient number, since it is larger than the sum of its proper divisors (1).

212001239 is an equidigital number, since it uses as much as digits as its factorization.

212001239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 212001239 is about 14560.2623259336. The cubic root of 212001239 is about 596.2743573798.

The spelling of 212001239 in words is "two hundred twelve million, one thousand, two hundred thirty-nine".