12111021121101 has 48 divisors (see below), whose sum is σ = 19462980435840. Its totient is φ = 6671351756160.

The previous prime is 12111021121063. The next prime is 12111021121127. The reversal of 12111021121101 is 10112112011121.

It is not a de Polignac number, because 12111021121101 - 2⁹ = 12111021120589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111021141101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 438795 + ... + 4941111.

It is an arithmetic number, because the mean of its divisors is an integer number (405478759080).

Almost surely, 2^{12111021121101} is an apocalyptic number.

It is an amenable number.

12111021121101 is a deficient number, since it is larger than the sum of its proper divisors (7351959314739).

12111021121101 is a wasteful number, since it uses less digits than its factorization.

12111021121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4502994 (or 4502987 counting only the distinct ones).

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

Adding to 12111021121101 its reverse (10112112011121), we get a palindrome (22223133132222).

The spelling of 12111021121101 in words is "twelve trillion, one hundred eleven billion, twenty-one million, one hundred twenty-one thousand, one hundred one".