12001322021021 has 4 divisors (see below), whose sum is σ = 12256669298112. Its totient is φ = 11745974743932.

The previous prime is 12001322021009. The next prime is 12001322021047. The reversal of 12001322021021 is 12012022310021.

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 12001322021021 - 2⁶ = 12001322020957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001322021321) 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, 127673638475 + ... + 127673638568.

It is an arithmetic number, because the mean of its divisors is an integer number (3064167324528).

Almost surely, 2^{12001322021021} is an apocalyptic number.

It is an amenable number.

12001322021021 is a deficient number, since it is larger than the sum of its proper divisors (255347277091).

12001322021021 is an equidigital number, since it uses as much as digits as its factorization.

12001322021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255347277090.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12001322021021 its reverse (12012022310021), we get a palindrome (24013344331042).

The spelling of 12001322021021 in words is "twelve trillion, one billion, three hundred twenty-two million, twenty-one thousand, twenty-one".