12012012220021 has 4 divisors (see below), whose sum is σ = 13104013330944. Its totient is φ = 10920011109100.

The previous prime is 12012012219917. The next prime is 12012012220067. The reversal of 12012012220021 is 12002221021021.

It is a happy number.

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 12012012220021 - 2²³ = 12012003831413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12012012219977 and 12012012220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012012220421) 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, 546000555445 + ... + 546000555466.

It is an arithmetic number, because the mean of its divisors is an integer number (3276003332736).

Almost surely, 2^{12012012220021} is an apocalyptic number.

12012012220021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12012012220021 is a deficient number, since it is larger than the sum of its proper divisors (1092001110923).

12012012220021 is a wasteful number, since it uses less digits than its factorization.

12012012220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092001110922.

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

Adding to 12012012220021 its reverse (12002221021021), we get a palindrome (24014233241042).

The spelling of 12012012220021 in words is "twelve trillion, twelve billion, twelve million, two hundred twenty thousand, twenty-one".