12211210212111 has 48 divisors (see below), whose sum is σ = 18365806368000. Its totient is φ = 8107830908928.

The previous prime is 12211210212053. The next prime is 12211210212127. The reversal of 12211210212111 is 11121201211221.

It is a happy number.

12211210212111 is a `hidden beast` number, since 1 + 221 + 1 + 210 + 21 + 211 + 1 = 666.

12211210212111 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 12211210212111 - 2¹⁴ = 12211210195727 is a prime.

It is a super-2 number, since 2×12211210212111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211210212011) 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, 537004780 + ... + 537027518.

It is an arithmetic number, because the mean of its divisors is an integer number (382620966000).

Almost surely, 2^{12211210212111} is an apocalyptic number.

12211210212111 is a deficient number, since it is larger than the sum of its proper divisors (6154596155889).

12211210212111 is an equidigital number, since it uses as much as digits as its factorization.

12211210212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31610 (or 31598 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 12211210212111 its reverse (11121201211221), we get a palindrome (23332411423332).

The spelling of 12211210212111 in words is "twelve trillion, two hundred eleven billion, two hundred ten million, two hundred twelve thousand, one hundred eleven".