11003111232221 has 2 divisors, whose sum is σ = 11003111232222. Its totient is φ = 11003111232220.

The previous prime is 11003111232143. The next prime is 11003111232251. The reversal of 11003111232221 is 12223211130011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6671243265625 + 4331867966596 = 2582875^2 + 2081314^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11003111232221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11003111232193 and 11003111232202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11003111232251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5501555616110 + 5501555616111.

It is an arithmetic number, because the mean of its divisors is an integer number (5501555616111).

Almost surely, 2^{11003111232221} is an apocalyptic number.

It is an amenable number.

11003111232221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11003111232221 is an equidigital number, since it uses as much as digits as its factorization.

11003111232221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 11003111232221 its reverse (12223211130011), we get a palindrome (23226322362232).

The spelling of 11003111232221 in words is "eleven trillion, three billion, one hundred eleven million, two hundred thirty-two thousand, two hundred twenty-one".