2011221041321 has 2 divisors, whose sum is σ = 2011221041322. Its totient is φ = 2011221041320.

The previous prime is 2011221041273. The next prime is 2011221041341. The reversal of 2011221041321 is 1231401221102.

It is an a-pointer prime, because the next prime (2011221041341) can be obtained adding 2011221041321 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1691068768921 + 320152272400 = 1300411^2 + 565820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2011221041321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2011221041293 and 2011221041302.

It is not a weakly prime, because it can be changed into another prime (2011221041341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005610520660 + 1005610520661.

It is an arithmetic number, because the mean of its divisors is an integer number (1005610520661).

Almost surely, 2^{2011221041321} is an apocalyptic number.

It is an amenable number.

2011221041321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011221041321 is an equidigital number, since it uses as much as digits as its factorization.

2011221041321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 2011221041321 its reverse (1231401221102), we get a palindrome (3242622262423).

The spelling of 2011221041321 in words is "two trillion, eleven billion, two hundred twenty-one million, forty-one thousand, three hundred twenty-one".