102204212105 has 4 divisors (see below), whose sum is σ = 122645054532. Its totient is φ = 81763369680.

The previous prime is 102204212081. The next prime is 102204212113. The reversal of 102204212105 is 501212402201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501212402201 = 7 ⋅71601771743.

It can be written as a sum of positive squares in 2 ways, for example, as 20096748169 + 82107463936 = 141763^2 + 286544^2 .

It is not a de Polignac number, because 102204212105 - 2⁸ = 102204211849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10220421206 + ... + 10220421215.

It is an arithmetic number, because the mean of its divisors is an integer number (30661263633).

Almost surely, 2^102204212105 is an apocalyptic number.

It is an amenable number.

102204212105 is a deficient number, since it is larger than the sum of its proper divisors (20440842427).

102204212105 is an equidigital number, since it uses as much as digits as its factorization.

102204212105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20440842426.

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 102204212105 its reverse (501212402201), we get a palindrome (603416614306).

The spelling of 102204212105 in words is "one hundred two billion, two hundred four million, two hundred twelve thousand, one hundred five".