111211211012211 has 24 divisors (see below), whose sum is σ = 166590924165120. Its totient is φ = 74139500082312.

The previous prime is 111211211012203. The next prime is 111211211012227. The reversal of 111211211012211 is 112210112112111.

111211211012211 is a `hidden beast` number, since 111 + 211 + 21 + 101 + 221 + 1 = 666.

It is not a de Polignac number, because 111211211012211 - 2³ = 111211211012203 is a prime.

It is a super-2 number, since 2×111211211012211² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111211211012411) 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, 9873726 + ... + 17886108.

It is an arithmetic number, because the mean of its divisors is an integer number (6941288506880).

Almost surely, 2^{111211211012211} is an apocalyptic number.

111211211012211 is a deficient number, since it is larger than the sum of its proper divisors (55379713152909).

111211211012211 is an frugal number, since it uses more digits than its factorization.

111211211012211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8069517 (or 8069505 counting only the distinct ones).

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

Adding to 111211211012211 its reverse (112210112112111), we get a palindrome (223421323124322).

The spelling of 111211211012211 in words is "one hundred eleven trillion, two hundred eleven billion, two hundred eleven million, twelve thousand, two hundred eleven".