212121210220012 has 24 divisors (see below), whose sum is σ = 393094579983840. Its totient is φ = 99809947848960.

The previous prime is 212121210219991. The next prime is 212121210220037. The reversal of 212121210220012 is 210022012121212.

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, 183766312 + ... + 184917007.

It is an arithmetic number, because the mean of its divisors is an integer number (16378940832660).

Almost surely, 2^{212121210220012} is an apocalyptic number.

It is an amenable number.

212121210220012 is a deficient number, since it is larger than the sum of its proper divisors (180973369763828).

212121210220012 is a wasteful number, since it uses less digits than its factorization.

212121210220012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368691801 (or 368691799 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 212121210220012 its reverse (210022012121212), we get a palindrome (422143222341224).

The spelling of 212121210220012 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred ten million, two hundred twenty thousand, twelve".