12020002012021 has 4 divisors (see below), whose sum is σ = 12313172792844. Its totient is φ = 11726831231200.

The previous prime is 12020002012001. The next prime is 12020002012027. The reversal of 12020002012021 is 12021020002021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3628053515025 + 8391948496996 = 1904745^2 + 2896886^2 .

It is a cyclic number.

It is not a de Polignac number, because 12020002012021 - 2³³ = 12011412077429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12020002011992 and 12020002012010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020002012027) 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, 146585390350 + ... + 146585390431.

It is an arithmetic number, because the mean of its divisors is an integer number (3078293198211).

Almost surely, 2^{12020002012021} is an apocalyptic number.

It is an amenable number.

12020002012021 is a deficient number, since it is larger than the sum of its proper divisors (293170780823).

12020002012021 is an equidigital number, since it uses as much as digits as its factorization.

12020002012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293170780822.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12020002012021 its reverse (12021020002021), we get a palindrome (24041022014042).

The spelling of 12020002012021 in words is "twelve trillion, twenty billion, two million, twelve thousand, twenty-one".