21221233000213 has 2 divisors, whose sum is σ = 21221233000214. Its totient is φ = 21221233000212.

The previous prime is 21221233000169. The next prime is 21221233000309. The reversal of 21221233000213 is 31200033212212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18934142390244 + 2287090609969 = 4351338^2 + 1512313^2 .

It is a cyclic number.

It is not a de Polignac number, because 21221233000213 - 2¹⁷ = 21221232869141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21221233000313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610616500106 + 10610616500107.

It is an arithmetic number, because the mean of its divisors is an integer number (10610616500107).

Almost surely, 2^{21221233000213} is an apocalyptic number.

It is an amenable number.

21221233000213 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221233000213 is an equidigital number, since it uses as much as digits as its factorization.

21221233000213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21221233000213 its reverse (31200033212212), we get a palindrome (52421266212425).

The spelling of 21221233000213 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred thirty-three million, two hundred thirteen", and thus it is an aban number.