21103320033331 has 2 divisors, whose sum is σ = 21103320033332. Its totient is φ = 21103320033330.

The previous prime is 21103320033227. The next prime is 21103320033343. The reversal of 21103320033331 is 13333002330112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21103320033331 is a prime.

It is a super-2 number, since 2×21103320033331² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21103320033296 and 21103320033305.

It is not a weakly prime, because it can be changed into another prime (21103320033031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551660016665 + 10551660016666.

It is an arithmetic number, because the mean of its divisors is an integer number (10551660016666).

Almost surely, 2^{21103320033331} is an apocalyptic number.

21103320033331 is a deficient number, since it is larger than the sum of its proper divisors (1).

21103320033331 is an equidigital number, since it uses as much as digits as its factorization.

21103320033331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 25.

Adding to 21103320033331 its reverse (13333002330112), we get a palindrome (34436322363443).

The spelling of 21103320033331 in words is "twenty-one trillion, one hundred three billion, three hundred twenty million, thirty-three thousand, three hundred thirty-one".