21220012220211 has 48 divisors (see below), whose sum is σ = 35510934424576. Its totient is φ = 11959207348608.

The previous prime is 21220012220191. The next prime is 21220012220213. The reversal of 21220012220211 is 11202221002212.

It is a happy number.

21220012220211 is a `hidden beast` number, since 2 + 1 + 220 + 0 + 12 + 220 + 211 = 666.

It is not a de Polignac number, because 21220012220211 - 2⁵ = 21220012220179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21220012220213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 178947606 + ... + 179066148.

Almost surely, 2^{21220012220211} is an apocalyptic number.

21220012220211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21220012220211 is a deficient number, since it is larger than the sum of its proper divisors (14290922204365).

21220012220211 is a wasteful number, since it uses less digits than its factorization.

21220012220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157552 (or 157549 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21220012220211 its reverse (11202221002212), we get a palindrome (32422233222423).

The spelling of 21220012220211 in words is "twenty-one trillion, two hundred twenty billion, twelve million, two hundred twenty thousand, two hundred eleven".