212221210102 has 16 divisors (see below), whose sum is σ = 347287836672. Its totient is φ = 96459529320.

The previous prime is 212221210043. The next prime is 212221210129. The reversal of 212221210102 is 201012122212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256003 + ... + 699985.

It is an arithmetic number, because the mean of its divisors is an integer number (21705489792).

Almost surely, 2^212221210102 is an apocalyptic number.

212221210102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

212221210102 is a deficient number, since it is larger than the sum of its proper divisors (135066626570).

212221210102 is a wasteful number, since it uses less digits than its factorization.

212221210102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465723.

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

Adding to 212221210102 its reverse (201012122212), we get a palindrome (413233332314).

The spelling of 212221210102 in words is "two hundred twelve billion, two hundred twenty-one million, two hundred ten thousand, one hundred two".