12111220210111 has 8 divisors (see below), whose sum is σ = 13259937850704. Its totient is φ = 10970452173120.

The previous prime is 12111220210091. The next prime is 12111220210123. The reversal of 12111220210111 is 11101202211121.

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

It is not a de Polignac number, because 12111220210111 - 2⁷ = 12111220209983 is a prime.

It is a super-2 number, since 2×12111220210111² (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 (12111220210171) 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, 1987397710 + ... + 1987403803.

It is an arithmetic number, because the mean of its divisors is an integer number (1657492231338).

Almost surely, 2^{12111220210111} is an apocalyptic number.

12111220210111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12111220210111 is a deficient number, since it is larger than the sum of its proper divisors (1148717640593).

12111220210111 is a wasteful number, since it uses less digits than its factorization.

12111220210111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3974801801.

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

Adding to 12111220210111 its reverse (11101202211121), we get a palindrome (23212422421232).

The spelling of 12111220210111 in words is "twelve trillion, one hundred eleven billion, two hundred twenty million, two hundred ten thousand, one hundred eleven".