211131101113 has 4 divisors (see below), whose sum is σ = 218411483940. Its totient is φ = 203850718288.

The previous prime is 211131101087. The next prime is 211131101117. The reversal of 211131101113 is 311101131112.

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 102555579049 + 108575522064 = 320243^2 + 329508^2 .

It is a cyclic number.

It is not a de Polignac number, because 211131101113 - 2⁹ = 211131100601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211131101117) 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, 3640191370 + ... + 3640191427.

It is an arithmetic number, because the mean of its divisors is an integer number (54602870985).

Almost surely, 2^211131101113 is an apocalyptic number.

It is an amenable number.

211131101113 is a deficient number, since it is larger than the sum of its proper divisors (7280382827).

211131101113 is an equidigital number, since it uses as much as digits as its factorization.

211131101113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7280382826.

The product of its (nonzero) digits is 18, while the sum is 16.

Adding to 211131101113 its reverse (311101131112), we get a palindrome (522232232225).

The spelling of 211131101113 in words is "two hundred eleven billion, one hundred thirty-one million, one hundred one thousand, one hundred thirteen".