212121202112 has 14 divisors (see below), whose sum is σ = 420928010568. Its totient is φ = 106060601024.

The previous prime is 212121202093. The next prime is 212121202129. The reversal of 212121202112 is 211202121212.

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, 1657196828 + ... + 1657196955.

Almost surely, 2^212121202112 is an apocalyptic number.

It is an amenable number.

212121202112 is a deficient number, since it is larger than the sum of its proper divisors (208806808456).

212121202112 is an equidigital number, since it uses as much as digits as its factorization.

212121202112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3314393795 (or 3314393785 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212121202112 its reverse (211202121212), we get a palindrome (423323323324).

The spelling of 212121202112 in words is "two hundred twelve billion, one hundred twenty-one million, two hundred two thousand, one hundred twelve".