21222223355563 has 16 divisors (see below), whose sum is σ = 23662503349920. Its totient is φ = 18915200580096.

The previous prime is 21222223355539. The next prime is 21222223355587. The reversal of 21222223355563 is 36555332222212.

It is an interprime number because it is at equal distance from previous prime (21222223355539) and next prime (21222223355587).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21222223355563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21222223355863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12021856 + ... + 13673677.

It is an arithmetic number, because the mean of its divisors is an integer number (1478906459370).

Almost surely, 2^{21222223355563} is an apocalyptic number.

21222223355563 is a deficient number, since it is larger than the sum of its proper divisors (2440279994357).

21222223355563 is a wasteful number, since it uses less digits than its factorization.

21222223355563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25698126.

The product of its digits is 1296000, while the sum is 43.

Adding to 21222223355563 its reverse (36555332222212), we get a palindrome (57777555577775).

The spelling of 21222223355563 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty-three million, three hundred fifty-five thousand, five hundred sixty-three".