12210212011111 has 4 divisors (see below), whose sum is σ = 12210225542424. Its totient is φ = 12210198479800.

The previous prime is 12210212011031. The next prime is 12210212011117. The reversal of 12210212011111 is 11111021201221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12210212011111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210212011117) 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, 5307325 + ... + 7251766.

It is an arithmetic number, because the mean of its divisors is an integer number (3052556385606).

Almost surely, 2^{12210212011111} is an apocalyptic number.

12210212011111 is a deficient number, since it is larger than the sum of its proper divisors (13531313).

12210212011111 is an equidigital number, since it uses as much as digits as its factorization.

12210212011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13531312.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 12210212011111 its reverse (11111021201221), we get a palindrome (23321233212332).

The spelling of 12210212011111 in words is "twelve trillion, two hundred ten billion, two hundred twelve million, eleven thousand, one hundred eleven".