211423043113 has 4 divisors (see below), whose sum is σ = 215412157188. Its totient is φ = 207433929040.

The previous prime is 211423043107. The next prime is 211423043119. The reversal of 211423043113 is 311340324112.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (211423043107) and next prime (211423043119).

It can be written as a sum of positive squares in 2 ways, for example, as 78866612224 + 132556430889 = 280832^2 + 364083^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211423043113 is a prime.

It is a super-2 number, since 2×211423043113² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211423043119) 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, 1994556958 + ... + 1994557063.

It is an arithmetic number, because the mean of its divisors is an integer number (53853039297).

Almost surely, 2^211423043113 is an apocalyptic number.

It is an amenable number.

211423043113 is a deficient number, since it is larger than the sum of its proper divisors (3989114075).

211423043113 is an equidigital number, since it uses as much as digits as its factorization.

211423043113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3989114074.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 211423043113 its reverse (311340324112), we get a palindrome (522763367225).

The spelling of 211423043113 in words is "two hundred eleven billion, four hundred twenty-three million, forty-three thousand, one hundred thirteen".