12111122020021 has 4 divisors (see below), whose sum is σ = 12125221115200. Its totient is φ = 12097022924844.

The previous prime is 12111122020013. The next prime is 12111122020061. The reversal of 12111122020021 is 12002022111121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12111122020021 - 2³ = 12111122020013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12111122019977 and 12111122020004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111122020061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7049546301 + ... + 7049548018.

It is an arithmetic number, because the mean of its divisors is an integer number (3031305278800).

Almost surely, 2^{12111122020021} is an apocalyptic number.

It is an amenable number.

12111122020021 is a deficient number, since it is larger than the sum of its proper divisors (14099095179).

12111122020021 is an equidigital number, since it uses as much as digits as its factorization.

12111122020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14099095178.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12111122020021 its reverse (12002022111121), we get a palindrome (24113144131142).

The spelling of 12111122020021 in words is "twelve trillion, one hundred eleven billion, one hundred twenty-two million, twenty thousand, twenty-one".