212120212102 has 4 divisors (see below), whose sum is σ = 318180318156. Its totient is φ = 106060106050.

The previous prime is 212120212079. The next prime is 212120212133. The reversal of 212120212102 is 201212021212.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53030053024 + ... + 53030053027.

It is an arithmetic number, because the mean of its divisors is an integer number (79545079539).

Almost surely, 2^212120212102 is an apocalyptic number.

212120212102 is a deficient number, since it is larger than the sum of its proper divisors (106060106054).

212120212102 is a wasteful number, since it uses less digits than its factorization.

212120212102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106060106053.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212120212102 its reverse (201212021212), we get a palindrome (413332233314).

It can be divided in two parts, 21212021210 and 2, that added together give a palindrome (21212021212).

The spelling of 212120212102 in words is "two hundred twelve billion, one hundred twenty million, two hundred twelve thousand, one hundred two".