10211221011985 has 32 divisors (see below), whose sum is σ = 14127100600320. Its totient is φ = 6940510520832.

The previous prime is 10211221011923. The next prime is 10211221012009. The reversal of 10211221011985 is 58911012211201.

It is a happy number.

10211221011985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10211221011985 - 2¹³ = 10211221003793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10211221011985.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3829111 + ... + 5923219.

It is an arithmetic number, because the mean of its divisors is an integer number (441471893760).

Almost surely, 2^{10211221011985} is an apocalyptic number.

It is an amenable number.

10211221011985 is a deficient number, since it is larger than the sum of its proper divisors (3915879588335).

10211221011985 is a wasteful number, since it uses less digits than its factorization.

10211221011985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2095345.

The product of its (nonzero) digits is 2880, while the sum is 34.

The spelling of 10211221011985 in words is "ten trillion, two hundred eleven billion, two hundred twenty-one million, eleven thousand, nine hundred eighty-five".