21120221012211 has 12 divisors (see below), whose sum is σ = 30525805783200. Its totient is φ = 14071461244560.

The previous prime is 21120221012207. The next prime is 21120221012237. The reversal of 21120221012211 is 11221012202112.

21120221012211 is a `hidden beast` number, since 211 + 20 + 2 + 210 + 1 + 221 + 1 = 666.

It is not a de Polignac number, because 21120221012211 - 2² = 21120221012207 is a prime.

It is a super-2 number, since 2×21120221012211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21120221012281) 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, 723826011 + ... + 723855188.

It is an arithmetic number, because the mean of its divisors is an integer number (2543817148600).

Almost surely, 2^{21120221012211} is an apocalyptic number.

21120221012211 is a deficient number, since it is larger than the sum of its proper divisors (9405584770989).

21120221012211 is a wasteful number, since it uses less digits than its factorization.

21120221012211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447682826 (or 1447682823 counting only the distinct ones).

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

Adding to 21120221012211 its reverse (11221012202112), we get a palindrome (32341233214323).

The spelling of 21120221012211 in words is "twenty-one trillion, one hundred twenty billion, two hundred twenty-one million, twelve thousand, two hundred eleven".