21222015446266 has 16 divisors (see below), whose sum is σ = 32411363886144. Its totient is φ = 10419239454624.

The previous prime is 21222015446197. The next prime is 21222015446279. The reversal of 21222015446266 is 66264451022212.

It is a super-2 number, since 2×21222015446266² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252950470 + ... + 253034353.

It is an arithmetic number, because the mean of its divisors is an integer number (2025710242884).

Almost surely, 2^{21222015446266} is an apocalyptic number.

21222015446266 is a deficient number, since it is larger than the sum of its proper divisors (11189348439878).

21222015446266 is a wasteful number, since it uses less digits than its factorization.

21222015446266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505985205.

The product of its (nonzero) digits is 552960, while the sum is 43.

Adding to 21222015446266 its reverse (66264451022212), we get a palindrome (87486466468478).

The spelling of 21222015446266 in words is "twenty-one trillion, two hundred twenty-two billion, fifteen million, four hundred forty-six thousand, two hundred sixty-six".