21222009989353 has 2 divisors, whose sum is σ = 21222009989354. Its totient is φ = 21222009989352.

The previous prime is 21222009989269. The next prime is 21222009989449. The reversal of 21222009989353 is 35398990022212.

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., 18002684103849 + 3219325885504 = 4242957^2 + 1794248^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222009989353 - 2²⁵ = 21221976434921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21222009989294 and 21222009989303.

It is not a weakly prime, because it can be changed into another prime (21222009989953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611004994676 + 10611004994677.

It is an arithmetic number, because the mean of its divisors is an integer number (10611004994677).

Almost surely, 2^{21222009989353} is an apocalyptic number.

It is an amenable number.

21222009989353 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222009989353 is an equidigital number, since it uses as much as digits as its factorization.

21222009989353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4199040, while the sum is 55.

The spelling of 21222009989353 in words is "twenty-one trillion, two hundred twenty-two billion, nine million, nine hundred eighty-nine thousand, three hundred fifty-three".