211110212121211 has 16 divisors (see below), whose sum is σ = 227640664026720. Its totient is φ = 194621475882240.

The previous prime is 211110212121209. The next prime is 211110212121227. The reversal of 211110212121211 is 112121212011112.

It is a cyclic number.

It is not a de Polignac number, because 211110212121211 - 2¹ = 211110212121209 is a prime.

It is a super-2 number, since 2×211110212121211² (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 (211110212121241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41712975 + ... + 46499383.

It is an arithmetic number, because the mean of its divisors is an integer number (14227541501670).

Almost surely, 2^{211110212121211} is an apocalyptic number.

211110212121211 is a deficient number, since it is larger than the sum of its proper divisors (16530451905509).

211110212121211 is a wasteful number, since it uses less digits than its factorization.

211110212121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4790766.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 211110212121211 its reverse (112121212011112), we get a palindrome (323231424132323).

The spelling of 211110212121211 in words is "two hundred eleven trillion, one hundred ten billion, two hundred twelve million, one hundred twenty-one thousand, two hundred eleven".