211121212220012 has 6 divisors (see below), whose sum is σ = 369462121385028. Its totient is φ = 105560606110004.

The previous prime is 211121212219997. The next prime is 211121212220033. The reversal of 211121212220012 is 210022212121112.

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 as a sum of consecutive naturals, namely, 26390151527498 + ... + 26390151527505.

It is an arithmetic number, because the mean of its divisors is an integer number (61577020230838).

Almost surely, 2^{211121212220012} is an apocalyptic number.

It is an amenable number.

211121212220012 is a deficient number, since it is larger than the sum of its proper divisors (158340909165016).

211121212220012 is a wasteful number, since it uses less digits than its factorization.

211121212220012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52780303055007 (or 52780303055005 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 211121212220012 its reverse (210022212121112), we get a palindrome (421143424341124).

The spelling of 211121212220012 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twenty thousand, twelve".