12101111121 has 8 divisors (see below), whose sum is σ = 17601616224. Its totient is φ = 7334006720.

The previous prime is 12101111119. The next prime is 12101111129. The reversal of 12101111121 is 12111110121.

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 12101111121 - 2¹ = 12101111119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12101111097 and 12101111106.

It is not an unprimeable number, because it can be changed into a prime (12101111129) 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, 183350136 + ... + 183350201.

It is an arithmetic number, because the mean of its divisors is an integer number (2200202028).

Almost surely, 2^12101111121 is an apocalyptic number.

12101111121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12101111121 is a deficient number, since it is larger than the sum of its proper divisors (5500505103).

12101111121 is a wasteful number, since it uses less digits than its factorization.

12101111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366700351.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 12101111121 its reverse (12111110121), we get a palindrome (24212221242).

The spelling of 12101111121 in words is "twelve billion, one hundred one million, one hundred eleven thousand, one hundred twenty-one".