21220010363 has 2 divisors, whose sum is σ = 21220010364. Its totient is φ = 21220010362.

The previous prime is 21220010303. The next prime is 21220010377. The reversal of 21220010363 is 36301002212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21220010363 - 2⁸ = 21220010107 is a prime.

It is not a weakly prime, because it can be changed into another prime (21220010303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610005181 + 10610005182.

It is an arithmetic number, because the mean of its divisors is an integer number (10610005182).

Almost surely, 2^21220010363 is an apocalyptic number.

21220010363 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220010363 is an equidigital number, since it uses as much as digits as its factorization.

21220010363 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21220010363 its reverse (36301002212), we get a palindrome (57521012575).

The spelling of 21220010363 in words is "twenty-one billion, two hundred twenty million, ten thousand, three hundred sixty-three".