12111212200111 has 8 divisors (see below), whose sum is σ = 12393085503744. Its totient is φ = 11829348769560.

The previous prime is 12111212200103. The next prime is 12111212200141. The reversal of 12111212200111 is 11100221211121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12111212200111 - 2³ = 12111212200103 is a prime.

It is a super-2 number, since 2×12111212200111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111212200141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43050 + ... + 4921816.

It is an arithmetic number, because the mean of its divisors is an integer number (1549135687968).

Almost surely, 2^{12111212200111} is an apocalyptic number.

12111212200111 is a deficient number, since it is larger than the sum of its proper divisors (281873303633).

12111212200111 is an equidigital number, since it uses as much as digits as its factorization.

12111212200111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4936541.

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

Adding to 12111212200111 its reverse (11100221211121), we get a palindrome (23211433411232).

The spelling of 12111212200111 in words is "twelve trillion, one hundred eleven billion, two hundred twelve million, two hundred thousand, one hundred eleven".