21112102220211 has 12 divisors (see below), whose sum is σ = 31319454945792. Its totient is φ = 13694336575056.

The previous prime is 21112102220203. The next prime is 21112102220233. The reversal of 21112102220211 is 11202220121112.

21112102220211 is a `hidden beast` number, since 21 + 1 + 1 + 210 + 2 + 220 + 211 = 666.

It is not a de Polignac number, because 21112102220211 - 2³ = 21112102220203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21112102220201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31699852851 + ... + 31699853516.

It is an arithmetic number, because the mean of its divisors is an integer number (2609954578816).

Almost surely, 2^{21112102220211} is an apocalyptic number.

21112102220211 is a deficient number, since it is larger than the sum of its proper divisors (10207352725581).

21112102220211 is a wasteful number, since it uses less digits than its factorization.

21112102220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63399706410 (or 63399706407 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21112102220211 its reverse (11202220121112), we get a palindrome (32314322341323).

The spelling of 21112102220211 in words is "twenty-one trillion, one hundred twelve billion, one hundred two million, two hundred twenty thousand, two hundred eleven".