211111022021212 has 12 divisors (see below), whose sum is σ = 374958382396360. Its totient is φ = 103980055622256.

The previous prime is 211111022021189. The next prime is 211111022021219. The reversal of 211111022021212 is 212120220111112.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 211111022021212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211111022021219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393863846787 + ... + 393863847322.

Almost surely, 2^{211111022021212} is an apocalyptic number.

It is an amenable number.

211111022021212 is a deficient number, since it is larger than the sum of its proper divisors (163847360375148).

211111022021212 is a wasteful number, since it uses less digits than its factorization.

211111022021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787727694180 (or 787727694178 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211111022021212 its reverse (212120220111112), we get a palindrome (423231242132324).

The spelling of 211111022021212 in words is "two hundred eleven trillion, one hundred eleven billion, twenty-two million, twenty-one thousand, two hundred twelve".