101213245205 has 4 divisors (see below), whose sum is σ = 121455894252. Its totient is φ = 80970596160.

The previous prime is 101213245193. The next prime is 101213245213. The reversal of 101213245205 is 502542312101.

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 15552833521 + 85660411684 = 124711^2 + 292678^2 .

It is not a de Polignac number, because 101213245205 - 2⁶ = 101213245141 is a prime.

It is a Duffinian number.

It is a congruent 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, 10121324516 + ... + 10121324525.

It is an arithmetic number, because the mean of its divisors is an integer number (30363973563).

Almost surely, 2^101213245205 is an apocalyptic number.

It is an amenable number.

101213245205 is a deficient number, since it is larger than the sum of its proper divisors (20242649047).

101213245205 is an equidigital number, since it uses as much as digits as its factorization.

101213245205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20242649046.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 101213245205 its reverse (502542312101), we get a palindrome (603755557306).

The spelling of 101213245205 in words is "one hundred one billion, two hundred thirteen million, two hundred forty-five thousand, two hundred five".