10211019985 has 4 divisors (see below), whose sum is σ = 12253223988. Its totient is φ = 8168815984.

The previous prime is 10211019977. The next prime is 10211019997. The reversal of 10211019985 is 58991011201.

10211019985 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.

It can be written as a sum of positive squares in 2 ways, for example, as 2750897601 + 7460122384 = 52449^2 + 86372^2 .

It is a cyclic number.

It is not a de Polignac number, because 10211019985 - 2³ = 10211019977 is a prime.

It is a Duffinian 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, 1021101994 + ... + 1021102003.

It is an arithmetic number, because the mean of its divisors is an integer number (3063305997).

Almost surely, 2^10211019985 is an apocalyptic number.

It is an amenable number.

10211019985 is a deficient number, since it is larger than the sum of its proper divisors (2042204003).

10211019985 is an equidigital number, since it uses as much as digits as its factorization.

10211019985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042204002.

The product of its (nonzero) digits is 6480, while the sum is 37.

The spelling of 10211019985 in words is "ten billion, two hundred eleven million, nineteen thousand, nine hundred eighty-five".