211211011111112 has 16 divisors (see below), whose sum is σ = 416863837719600. Its totient is φ = 100047321052560.

The previous prime is 211211011111097. The next prime is 211211011111211. The reversal of 211211011111112 is 211111110112112.

It is a happy number.

It is a super-2 number, since 2×211211011111112² (a number of 29 digits) contains 22 as substring.

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 in 3 ways as a sum of consecutive naturals, for example, 694773062714 + ... + 694773063017.

It is an arithmetic number, because the mean of its divisors is an integer number (26053989857475).

Almost surely, 2^{211211011111112} is an apocalyptic number.

It is an amenable number.

211211011111112 is a deficient number, since it is larger than the sum of its proper divisors (205652826608488).

211211011111112 is a wasteful number, since it uses less digits than its factorization.

211211011111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389546125756 (or 1389546125752 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 17.

Adding to 211211011111112 its reverse (211111110112112), we get a palindrome (422322121223224).

The spelling of 211211011111112 in words is "two hundred eleven trillion, two hundred eleven billion, eleven million, one hundred eleven thousand, one hundred twelve".