12100111121121 has 8 divisors (see below), whose sum is σ = 16140554490144. Its totient is φ = 8063204249760.

The previous prime is 12100111121081. The next prime is 12100111121129. The reversal of 12100111121121 is 12112111100121.

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

It is not a de Polignac number, because 12100111121121 - 2⁶ = 12100111121057 is a prime.

It is a super-2 number, since 2×12100111121121² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12100111121121.

It is not an unprimeable number, because it can be changed into a prime (12100111121129) 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, 884116431 + ... + 884130116.

It is an arithmetic number, because the mean of its divisors is an integer number (2017569311268).

Almost surely, 2^{12100111121121} is an apocalyptic number.

It is an amenable number.

12100111121121 is a deficient number, since it is larger than the sum of its proper divisors (4040443369023).

12100111121121 is a wasteful number, since it uses less digits than its factorization.

12100111121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768248831.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 12100111121121 its reverse (12112111100121), we get a palindrome (24212222221242).

The spelling of 12100111121121 in words is "twelve trillion, one hundred billion, one hundred eleven million, one hundred twenty-one thousand, one hundred twenty-one".