12211110021 has 16 divisors (see below), whose sum is σ = 18533859840. Its totient is φ = 7078903920.

The previous prime is 12211110017. The next prime is 12211110049. The reversal of 12211110021 is 12001111221.

12211110021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12211110021 - 2² = 12211110017 is a prime.

It is a super-2 number, since 2×12211110021² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12211109979 and 12211110006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211110061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8043451 + ... + 8044968.

It is an arithmetic number, because the mean of its divisors is an integer number (1158366240).

Almost surely, 2^12211110021 is an apocalyptic number.

12211110021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12211110021 is a deficient number, since it is larger than the sum of its proper divisors (6322749819).

12211110021 is a wasteful number, since it uses less digits than its factorization.

12211110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16088456.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12211110021 its reverse (12001111221), we get a palindrome (24212221242).

The spelling of 12211110021 in words is "twelve billion, two hundred eleven million, one hundred ten thousand, twenty-one".