12221012432105 has 4 divisors (see below), whose sum is σ = 14665214918532. Its totient is φ = 9776809945680.

The previous prime is 12221012432087. The next prime is 12221012432117. The reversal of 12221012432105 is 50123421012221.

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 5474458139536 + 6746554292569 = 2339756^2 + 2597413^2 .

It is not a de Polignac number, because 12221012432105 - 2¹⁴ = 12221012415721 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1222101243206 + ... + 1222101243215.

It is an arithmetic number, because the mean of its divisors is an integer number (3666303729633).

Almost surely, 2^{12221012432105} is an apocalyptic number.

It is an amenable number.

12221012432105 is a deficient number, since it is larger than the sum of its proper divisors (2444202486427).

12221012432105 is an equidigital number, since it uses as much as digits as its factorization.

12221012432105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444202486426.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 12221012432105 its reverse (50123421012221), we get a palindrome (62344433444326).

The spelling of 12221012432105 in words is "twelve trillion, two hundred twenty-one billion, twelve million, four hundred thirty-two thousand, one hundred five".