12111201111021 has 16 divisors (see below), whose sum is σ = 16187161642368. Its totient is φ = 8054688600000.

The previous prime is 12111201111019. The next prime is 12111201111043. The reversal of 12111201111021 is 12011110211121.

It is not a de Polignac number, because 12111201111021 - 2¹ = 12111201111019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111201111071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42485455 + ... + 42769571.

It is an arithmetic number, because the mean of its divisors is an integer number (1011697602648).

Almost surely, 2^{12111201111021} is an apocalyptic number.

It is an amenable number.

12111201111021 is a deficient number, since it is larger than the sum of its proper divisors (4075960531347).

12111201111021 is a wasteful number, since it uses less digits than its factorization.

12111201111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318292.

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

Adding to 12111201111021 its reverse (12011110211121), we get a palindrome (24122311322142).

The spelling of 12111201111021 in words is "twelve trillion, one hundred eleven billion, two hundred one million, one hundred eleven thousand, twenty-one".