12102220205 has 4 divisors (see below), whose sum is σ = 14522664252. Its totient is φ = 9681776160.

The previous prime is 12102220177. The next prime is 12102220213. The reversal of 12102220205 is 50202220121.

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 4880279881 + 7221940324 = 69859^2 + 84982^2 .

It is not a de Polignac number, because 12102220205 - 2⁸ = 12102219949 is a prime.

It is a Duffinian number.

It is a congruent 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, 1210222016 + ... + 1210222025.

It is an arithmetic number, because the mean of its divisors is an integer number (3630666063).

Almost surely, 2^12102220205 is an apocalyptic number.

It is an amenable number.

12102220205 is a deficient number, since it is larger than the sum of its proper divisors (2420444047).

12102220205 is an equidigital number, since it uses as much as digits as its factorization.

12102220205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2420444046.

The product of its (nonzero) digits is 160, while the sum is 17.

Adding to 12102220205 its reverse (50202220121), we get a palindrome (62304440326).

The spelling of 12102220205 in words is "twelve billion, one hundred two million, two hundred twenty thousand, two hundred five".