12000221221021 has 4 divisors (see below), whose sum is σ = 13091150422944. Its totient is φ = 10909292019100.

The previous prime is 12000221220991. The next prime is 12000221221081. The reversal of 12000221221021 is 12012212200021.

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 12000221221021 - 2⁷ = 12000221220893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12000221220986 and 12000221221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000221221081) 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, 545464600945 + ... + 545464600966.

It is an arithmetic number, because the mean of its divisors is an integer number (3272787605736).

Almost surely, 2^{12000221221021} is an apocalyptic number.

12000221221021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12000221221021 is a deficient number, since it is larger than the sum of its proper divisors (1090929201923).

12000221221021 is a wasteful number, since it uses less digits than its factorization.

12000221221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090929201922.

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

Adding to 12000221221021 its reverse (12012212200021), we get a palindrome (24012433421042).

The spelling of 12000221221021 in words is "twelve trillion, two hundred twenty-one million, two hundred twenty-one thousand, twenty-one".