21220020012263 has 2 divisors, whose sum is σ = 21220020012264. Its totient is φ = 21220020012262.

The previous prime is 21220020012193. The next prime is 21220020012271. The reversal of 21220020012263 is 36221002002212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21220020012263 - 2⁸ = 21220020012007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21220020012463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610010006131 + 10610010006132.

It is an arithmetic number, because the mean of its divisors is an integer number (10610010006132).

Almost surely, 2^{21220020012263} is an apocalyptic number.

21220020012263 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220020012263 is an equidigital number, since it uses as much as digits as its factorization.

21220020012263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21220020012263 its reverse (36221002002212), we get a palindrome (57441022014475).

The spelling of 21220020012263 in words is "twenty-one trillion, two hundred twenty billion, twenty million, twelve thousand, two hundred sixty-three".