213131300111 has 4 divisors (see below), whose sum is σ = 217666008672. Its totient is φ = 208596591552.

The previous prime is 213131300089. The next prime is 213131300143. The reversal of 213131300111 is 111003131312.

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

It is a cyclic number.

It is not a de Polignac number, because 213131300111 - 2³⁰ = 212057558287 is a prime.

It is a super-2 number, since 2×213131300111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213131300111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213131300171) 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, 2267354210 + ... + 2267354303.

It is an arithmetic number, because the mean of its divisors is an integer number (54416502168).

Almost surely, 2^213131300111 is an apocalyptic number.

213131300111 is a deficient number, since it is larger than the sum of its proper divisors (4534708561).

213131300111 is an equidigital number, since it uses as much as digits as its factorization.

213131300111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4534708560.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 213131300111 its reverse (111003131312), we get a palindrome (324134431423).

The spelling of 213131300111 in words is "two hundred thirteen billion, one hundred thirty-one million, three hundred thousand, one hundred eleven".