12011000221021 has 2 divisors, whose sum is σ = 12011000221022. Its totient is φ = 12011000221020.

The previous prime is 12011000220991. The next prime is 12011000221027. The reversal of 12011000221021 is 12012200011021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6767880295225 + 5243119925796 = 2601515^2 + 2289786^2 .

It is a cyclic number.

It is not a de Polignac number, because 12011000221021 - 2³⁹ = 11461244407133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12011000220992 and 12011000221010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12011000221027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005500110510 + 6005500110511.

It is an arithmetic number, because the mean of its divisors is an integer number (6005500110511).

Almost surely, 2^{12011000221021} is an apocalyptic number.

It is an amenable number.

12011000221021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011000221021 is an equidigital number, since it uses as much as digits as its factorization.

12011000221021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12011000221021 its reverse (12012200011021), we get a palindrome (24023200232042).

The spelling of 12011000221021 in words is "twelve trillion, eleven billion, two hundred twenty-one thousand, twenty-one".