211211212101112 has 8 divisors (see below), whose sum is σ = 396021022689600. Its totient is φ = 105605606050552.

The previous prime is 211211212101103. The next prime is 211211212101133. The reversal of 211211212101112 is 211101212112112.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×211211212101112² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211211212101112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13200700756312 + ... + 13200700756327.

It is an arithmetic number, because the mean of its divisors is an integer number (49502627836200).

Almost surely, 2^{211211212101112} is an apocalyptic number.

It is an amenable number.

211211212101112 is a deficient number, since it is larger than the sum of its proper divisors (184809810588488).

211211212101112 is a wasteful number, since it uses less digits than its factorization.

211211212101112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26401401512645 (or 26401401512641 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 211211212101112 its reverse (211101212112112), we get a palindrome (422312424213224).

The spelling of 211211212101112 in words is "two hundred eleven trillion, two hundred eleven billion, two hundred twelve million, one hundred one thousand, one hundred twelve".