10211220205 has 4 divisors (see below), whose sum is σ = 12253464252. Its totient is φ = 8168976160.

The previous prime is 10211220197. The next prime is 10211220259. The reversal of 10211220205 is 50202211201.

It is a happy number.

10211220205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50202211201 = 6719 ⋅7471679.

It can be written as a sum of positive squares in 2 ways, for example, as 2546918089 + 7664302116 = 50467^2 + 87546^2 .

It is not a de Polignac number, because 10211220205 - 2³ = 10211220197 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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1021122016 + ... + 1021122025.

It is an arithmetic number, because the mean of its divisors is an integer number (3063366063).

Almost surely, 2^10211220205 is an apocalyptic number.

It is an amenable number.

10211220205 is a deficient number, since it is larger than the sum of its proper divisors (2042244047).

10211220205 is an equidigital number, since it uses as much as digits as its factorization.

10211220205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042244046.

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 10211220205 its reverse (50202211201), we get a palindrome (60413431406).

It can be divided in two parts, 1021122020 and 5, that added together give a square (1021122025 = 31955²).

The spelling of 10211220205 in words is "ten billion, two hundred eleven million, two hundred twenty thousand, two hundred five".