12211212200111 has 4 divisors (see below), whose sum is σ = 12215480365224. Its totient is φ = 12206944035000.

The previous prime is 12211212200093. The next prime is 12211212200129. The reversal of 12211212200111 is 11100221211221.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12211212200093) and next prime (12211212200129).

It is a cyclic number.

It is not a de Polignac number, because 12211212200111 - 2²⁶ = 12211145091247 is a prime.

It is a super-2 number, since 2×12211212200111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12211212200111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211212200141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2134078265 + ... + 2134083986.

It is an arithmetic number, because the mean of its divisors is an integer number (3053870091306).

Almost surely, 2^{12211212200111} is an apocalyptic number.

12211212200111 is a deficient number, since it is larger than the sum of its proper divisors (4268165113).

12211212200111 is an equidigital number, since it uses as much as digits as its factorization.

12211212200111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4268165112.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12211212200111 its reverse (11100221211221), we get a palindrome (23311433411332).

The spelling of 12211212200111 in words is "twelve trillion, two hundred eleven billion, two hundred twelve million, two hundred thousand, one hundred eleven".