12020111200021 has 4 divisors (see below), whose sum is σ = 12065815045152. Its totient is φ = 11974407354892.

The previous prime is 12020111200007. The next prime is 12020111200061. The reversal of 12020111200021 is 12000211102021.

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 12020111200021 - 2²⁹ = 12019574329109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12020111199974 and 12020111200010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020111200061) 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, 22851922171 + ... + 22851922696.

It is an arithmetic number, because the mean of its divisors is an integer number (3016453761288).

Almost surely, 2^{12020111200021} is an apocalyptic number.

It is an amenable number.

12020111200021 is a deficient number, since it is larger than the sum of its proper divisors (45703845131).

12020111200021 is an equidigital number, since it uses as much as digits as its factorization.

12020111200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45703845130.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12020111200021 its reverse (12000211102021), we get a palindrome (24020322302042).

The spelling of 12020111200021 in words is "twelve trillion, twenty billion, one hundred eleven million, two hundred thousand, twenty-one".