12211121122211 has 16 divisors (see below), whose sum is σ = 14104985880960. Its totient is φ = 10447898455680.

The previous prime is 12211121122171. The next prime is 12211121122223. The reversal of 12211121122211 is 11222112111221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12211121122211 - 2¹⁰ = 12211121121187 is a prime.

It is a super-2 number, since 2×12211121122211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12211121152211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18561260 + ... + 19207878.

It is an arithmetic number, because the mean of its divisors is an integer number (881561617560).

Almost surely, 2^{12211121122211} is an apocalyptic number.

12211121122211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12211121122211 is a deficient number, since it is larger than the sum of its proper divisors (1893864758749).

12211121122211 is a wasteful number, since it uses less digits than its factorization.

12211121122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747634.

The product of its digits is 64, while the sum is 20.

Adding to 12211121122211 its reverse (11222112111221), we get a palindrome (23433233233432).

The spelling of 12211121122211 in words is "twelve trillion, two hundred eleven billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred eleven".