211320312113 has 4 divisors (see below), whose sum is σ = 211430779428. Its totient is φ = 211209844800.

The previous prime is 211320312107. The next prime is 211320312127. The reversal of 211320312113 is 311213023112.

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 178280706289 + 33039605824 = 422233^2 + 181768^2 .

It is a cyclic number.

It is not a de Polignac number, because 211320312113 - 2¹⁴ = 211320295729 is a prime.

It is a super-3 number, since 3×211320312113³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211320312173) 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, 55230788 + ... + 55234613.

It is an arithmetic number, because the mean of its divisors is an integer number (52857694857).

Almost surely, 2^211320312113 is an apocalyptic number.

It is an amenable number.

211320312113 is a deficient number, since it is larger than the sum of its proper divisors (110467315).

211320312113 is a wasteful number, since it uses less digits than its factorization.

211320312113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110467314.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 211320312113 its reverse (311213023112), we get a palindrome (522533335225).

The spelling of 211320312113 in words is "two hundred eleven billion, three hundred twenty million, three hundred twelve thousand, one hundred thirteen".