21112212110211 has 24 divisors (see below), whose sum is σ = 31320047959200. Its totient is φ = 13694219842176.

The previous prime is 21112212110177. The next prime is 21112212110219. The reversal of 21112212110211 is 11201121221112.

It is a happy number.

21112212110211 is a `hidden beast` number, since 21 + 1 + 1 + 221 + 211 + 0 + 211 = 666.

It is not a de Polignac number, because 21112212110211 - 2¹⁰ = 21112212109187 is a prime.

It is a super-2 number, since 2×21112212110211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21112212110219) 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, 26322490 + ... + 27112688.

It is an arithmetic number, because the mean of its divisors is an integer number (1305001998300).

Almost surely, 2^{21112212110211} is an apocalyptic number.

21112212110211 is a deficient number, since it is larger than the sum of its proper divisors (10207835848989).

21112212110211 is a wasteful number, since it uses less digits than its factorization.

21112212110211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870475 (or 870472 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 21112212110211 its reverse (11201121221112), we get a palindrome (32313333331323).

The spelling of 21112212110211 in words is "twenty-one trillion, one hundred twelve billion, two hundred twelve million, one hundred ten thousand, two hundred eleven".