210111221113 has 4 divisors (see below), whose sum is σ = 210983052148. Its totient is φ = 209239390080.

The previous prime is 210111221077. The next prime is 210111221219. The reversal of 210111221113 is 311122111012.

It is a happy number.

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 190747942009 + 19363279104 = 436747^2 + 139152^2 .

It is a cyclic number.

It is not a de Polignac number, because 210111221113 - 2⁹ = 210111220601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210111221813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 435915156 + ... + 435915637.

It is an arithmetic number, because the mean of its divisors is an integer number (52745763037).

Almost surely, 2^210111221113 is an apocalyptic number.

It is an amenable number.

210111221113 is a deficient number, since it is larger than the sum of its proper divisors (871831035).

210111221113 is an equidigital number, since it uses as much as digits as its factorization.

210111221113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871831034.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 210111221113 its reverse (311122111012), we get a palindrome (521233332125).

The spelling of 210111221113 in words is "two hundred ten billion, one hundred eleven million, two hundred twenty-one thousand, one hundred thirteen".