21227063105 has 4 divisors (see below), whose sum is σ = 25472475732. Its totient is φ = 16981650480.

The previous prime is 21227063051. The next prime is 21227063149. The reversal of 21227063105 is 50136072212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5983950736 + 15243112369 = 77356^2 + 123463^2 .

It is not a de Polignac number, because 21227063105 - 2¹⁴ = 21227046721 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2122706306 + ... + 2122706315.

It is an arithmetic number, because the mean of its divisors is an integer number (6368118933).

Almost surely, 2^21227063105 is an apocalyptic number.

It is an amenable number.

21227063105 is a deficient number, since it is larger than the sum of its proper divisors (4245412627).

21227063105 is an equidigital number, since it uses as much as digits as its factorization.

21227063105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4245412626.

The product of its (nonzero) digits is 5040, while the sum is 29.

The spelling of 21227063105 in words is "twenty-one billion, two hundred twenty-seven million, sixty-three thousand, one hundred five".