12100111012221 has 8 divisors (see below), whose sum is σ = 17082509664384. Its totient is φ = 7592226517440.

The previous prime is 12100111012219. The next prime is 12100111012261. The reversal of 12100111012221 is 12221011100121.

It is a happy number.

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

It is not a de Polignac number, because 12100111012221 - 2¹ = 12100111012219 is a prime.

It is a super-2 number, since 2×12100111012221² (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 12100111012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100111012261) 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, 118628539285 + ... + 118628539386.

It is an arithmetic number, because the mean of its divisors is an integer number (2135313708048).

Almost surely, 2^{12100111012221} is an apocalyptic number.

It is an amenable number.

12100111012221 is a deficient number, since it is larger than the sum of its proper divisors (4982398652163).

12100111012221 is a wasteful number, since it uses less digits than its factorization.

12100111012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237257078691.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12100111012221 its reverse (12221011100121), we get a palindrome (24321122112342).

The spelling of 12100111012221 in words is "twelve trillion, one hundred billion, one hundred eleven million, twelve thousand, two hundred twenty-one".