210111112121211 has 24 divisors (see below), whose sum is σ = 348647240595680. Its totient is φ = 119441401998336.

The previous prime is 210111112121203. The next prime is 210111112121249. The reversal of 210111112121211 is 112121211111012.

210111112121211 is a `hidden beast` number, since 210 + 1 + 11 + 112 + 121 + 211 = 666.

It is not a de Polignac number, because 210111112121211 - 2³ = 210111112121203 is a prime.

It is a super-2 number, since 2×210111112121211² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210111112161211) 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, 8640135556 + ... + 8640159873.

Almost surely, 2^{210111112121211} is an apocalyptic number.

210111112121211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

210111112121211 is a deficient number, since it is larger than the sum of its proper divisors (138536128474469).

210111112121211 is a wasteful number, since it uses less digits than its factorization.

210111112121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17280295635 (or 17280295632 counting only the distinct ones).

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

Adding to 210111112121211 its reverse (112121211111012), we get a palindrome (322232323232223).

The spelling of 210111112121211 in words is "two hundred ten trillion, one hundred eleven billion, one hundred twelve million, one hundred twenty-one thousand, two hundred eleven".