220000021102105 has 4 divisors (see below), whose sum is σ = 264000025322532. Its totient is φ = 176000016881680.

The previous prime is 220000021102051. The next prime is 220000021102109. The reversal of 220000021102105 is 501201120000022.

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 56026976503689 + 163973044598416 = 7485117^2 + 12805196^2 .

It is not a de Polignac number, because 220000021102105 - 2⁹ = 220000021101593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220000021102109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22000002110206 + ... + 22000002110215.

It is an arithmetic number, because the mean of its divisors is an integer number (66000006330633).

Almost surely, 2^{220000021102105} is an apocalyptic number.

It is an amenable number.

220000021102105 is a deficient number, since it is larger than the sum of its proper divisors (44000004220427).

220000021102105 is an equidigital number, since it uses as much as digits as its factorization.

220000021102105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44000004220426.

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 220000021102105 its reverse (501201120000022), we get a palindrome (721201141102127).

The spelling of 220000021102105 in words is "two hundred twenty trillion, twenty-one million, one hundred two thousand, one hundred five".