212102342 has 4 divisors (see below), whose sum is σ = 318153516. Its totient is φ = 106051170.

The previous prime is 212102329. The next prime is 212102381. The reversal of 212102342 is 243201212.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 212102342.

It is a congruent number.

It is an unprimeable number.

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, 53025584 + ... + 53025587.

It is an arithmetic number, because the mean of its divisors is an integer number (79538379).

Almost surely, 2^212102342 is an apocalyptic number.

212102342 is a deficient number, since it is larger than the sum of its proper divisors (106051174).

212102342 is a wasteful number, since it uses less digits than its factorization.

212102342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106051173.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 212102342 is about 14563.7337932276. The cubic root of 212102342 is about 596.3691296964.

Adding to 212102342 its reverse (243201212), we get a palindrome (455303554).

The spelling of 212102342 in words is "two hundred twelve million, one hundred two thousand, three hundred forty-two".