12111021020021 has 16 divisors (see below), whose sum is σ = 15507548154240. Its totient is φ = 9182100876480.

The previous prime is 12111021020003. The next prime is 12111021020027. The reversal of 12111021020021 is 12002012011121.

It is not a de Polignac number, because 12111021020021 - 2¹⁸ = 12111020757877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12111021019978 and 12111021020005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111021020027) 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, 2125483466 + ... + 2125489163.

It is an arithmetic number, because the mean of its divisors is an integer number (969221759640).

Almost surely, 2^{12111021020021} is an apocalyptic number.

12111021020021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12111021020021 is a deficient number, since it is larger than the sum of its proper divisors (3396527134219).

12111021020021 is a wasteful number, since it uses less digits than its factorization.

12111021020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4250972684.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12111021020021 its reverse (12002012011121), we get a palindrome (24113033031142).

The spelling of 12111021020021 in words is "twelve trillion, one hundred eleven billion, twenty-one million, twenty thousand, twenty-one".