2120101213205 has 4 divisors (see below), whose sum is σ = 2544121455852. Its totient is φ = 1696080970560.

The previous prime is 2120101213189. The next prime is 2120101213253. The reversal of 2120101213205 is 5023121010212.

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 1286822521924 + 833278691281 = 1134382^2 + 912841^2 .

It is not a de Polignac number, because 2120101213205 - 2⁴ = 2120101213189 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 (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212010121316 + ... + 212010121325.

It is an arithmetic number, because the mean of its divisors is an integer number (636030363963).

Almost surely, 2^{2120101213205} is an apocalyptic number.

It is an amenable number.

2120101213205 is a deficient number, since it is larger than the sum of its proper divisors (424020242647).

2120101213205 is an equidigital number, since it uses as much as digits as its factorization.

2120101213205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424020242646.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 2120101213205 its reverse (5023121010212), we get a palindrome (7143222223417).

The spelling of 2120101213205 in words is "two trillion, one hundred twenty billion, one hundred one million, two hundred thirteen thousand, two hundred five".