211111211112012 has 36 divisors (see below), whose sum is σ = 533945606434240. Its totient is φ = 70330397768352.

The previous prime is 211111211111993. The next prime is 211111211112161. The reversal of 211111211112012 is 210211112111112.

211111211112012 is a `hidden beast` number, since 211 + 111 + 211 + 1 + 120 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×211111211112012² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1666849783 + ... + 1666976430.

Almost surely, 2^{211111211112012} is an apocalyptic number.

It is an amenable number.

211111211112012 is an abundant number, since it is smaller than the sum of its proper divisors (322834395322228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211111211112012 is a wasteful number, since it uses less digits than its factorization.

211111211112012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3333827982 (or 3333827977 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 18.

Adding to 211111211112012 its reverse (210211112111112), we get a palindrome (421322323223124).

The spelling of 211111211112012 in words is "two hundred eleven trillion, one hundred eleven billion, two hundred eleven million, one hundred twelve thousand, twelve".