211121102113 has 4 divisors (see below), whose sum is σ = 215104519188. Its totient is φ = 207137685040.

The previous prime is 211121102077. The next prime is 211121102131. The reversal of 211121102113 is 311201121112.

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 99141857424 + 111979244689 = 314868^2 + 334633^2 .

It is a cyclic number.

It is not a de Polignac number, because 211121102113 - 2²⁵ = 211087547681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211121103113) 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, 1991708458 + ... + 1991708563.

It is an arithmetic number, because the mean of its divisors is an integer number (53776129797).

Almost surely, 2^211121102113 is an apocalyptic number.

It is an amenable number.

211121102113 is a deficient number, since it is larger than the sum of its proper divisors (3983417075).

211121102113 is an equidigital number, since it uses as much as digits as its factorization.

211121102113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3983417074.

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

Adding to 211121102113 its reverse (311201121112), we get a palindrome (522322223225).

The spelling of 211121102113 in words is "two hundred eleven billion, one hundred twenty-one million, one hundred two thousand, one hundred thirteen".