12121200111 has 8 divisors (see below), whose sum is σ = 16598400304. Its totient is φ = 7862400000.

The previous prime is 12121200103. The next prime is 12121200121. The reversal of 12121200111 is 11100212121.

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

It is not a de Polignac number, because 12121200111 - 2³ = 12121200103 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 (12121200121) 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, 54599890 + ... + 54600111.

It is an arithmetic number, because the mean of its divisors is an integer number (2074800038).

Almost surely, 2^12121200111 is an apocalyptic number.

12121200111 is a deficient number, since it is larger than the sum of its proper divisors (4477200193).

12121200111 is a wasteful number, since it uses less digits than its factorization.

12121200111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109200041.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12121200111 its reverse (11100212121), we get a palindrome (23221412232).

The spelling of 12121200111 in words is "twelve billion, one hundred twenty-one million, two hundred thousand, one hundred eleven".