12012002221021 has 16 divisors (see below), whose sum is σ = 13157833583808. Its totient is φ = 10875161088000.

The previous prime is 12012002221019. The next prime is 12012002221091. The reversal of 12012002221021 is 12012220021021.

It is a happy number.

12012002221021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12012002221021 - 2¹ = 12012002221019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12012002220986 and 12012002221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012002221001) 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, 12691591 + ... + 13605163.

It is an arithmetic number, because the mean of its divisors is an integer number (822364598988).

Almost surely, 2^{12012002221021} is an apocalyptic number.

12012002221021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12012002221021 is a deficient number, since it is larger than the sum of its proper divisors (1145831362787).

12012002221021 is a wasteful number, since it uses less digits than its factorization.

12012002221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918492.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12012002221021 its reverse (12012220021021), we get a palindrome (24024222242042).

The spelling of 12012002221021 in words is "twelve trillion, twelve billion, two million, two hundred twenty-one thousand, twenty-one".