12041001221 has 2 divisors, whose sum is σ = 12041001222. Its totient is φ = 12041001220.

The previous prime is 12041001211. The next prime is 12041001251. The reversal of 12041001221 is 12210014021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6186609025 + 5854392196 = 78655^2 + 76514^2 .

It is a cyclic number.

It is not a de Polignac number, because 12041001221 - 2¹⁰ = 12041000197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12041001196 and 12041001205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12041001211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6020500610 + 6020500611.

It is an arithmetic number, because the mean of its divisors is an integer number (6020500611).

Almost surely, 2^12041001221 is an apocalyptic number.

It is an amenable number.

12041001221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12041001221 is an equidigital number, since it uses as much as digits as its factorization.

12041001221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12041001221 its reverse (12210014021), we get a palindrome (24251015242).

The spelling of 12041001221 in words is "twelve billion, forty-one million, one thousand, two hundred twenty-one".