211211021112111 has 24 divisors (see below), whose sum is σ = 313373866229424. Its totient is φ = 136981715379840.

The previous prime is 211211021112053. The next prime is 211211021112149. The reversal of 211211021112111 is 111211120112112.

211211021112111 is a `hidden beast` number, since 211 + 2 + 110 + 211 + 121 + 11 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-211211021112111 is a prime.

It is a super-2 number, since 2×211211021112111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211211021112181) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44079741 + ... + 48635846.

It is an arithmetic number, because the mean of its divisors is an integer number (13057244426226).

Almost surely, 2^{211211021112111} is an apocalyptic number.

211211021112111 is a deficient number, since it is larger than the sum of its proper divisors (102162845117313).

211211021112111 is a wasteful number, since it uses less digits than its factorization.

211211021112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92722471 (or 92722468 counting only the distinct ones).

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

Adding to 211211021112111 its reverse (111211120112112), we get a palindrome (322422141224223).

Subtracting from 211211021112111 its reverse (111211120112112), we obtain a palindrome (99999900999999).

The spelling of 211211021112111 in words is "two hundred eleven trillion, two hundred eleven billion, twenty-one million, one hundred twelve thousand, one hundred eleven".