213111013111 has 4 divisors (see below), whose sum is σ = 213960061224. Its totient is φ = 212261965000.

The previous prime is 213111013103. The next prime is 213111013153. The reversal of 213111013111 is 111310111312.

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 213111013111 - 2³ = 213111013103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213111313111) 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, 424523680 + ... + 424524181.

It is an arithmetic number, because the mean of its divisors is an integer number (53490015306).

Almost surely, 2^213111013111 is an apocalyptic number.

213111013111 is a deficient number, since it is larger than the sum of its proper divisors (849048113).

213111013111 is an equidigital number, since it uses as much as digits as its factorization.

213111013111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849048112.

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

Adding to 213111013111 its reverse (111310111312), we get a palindrome (324421124423).

The spelling of 213111013111 in words is "two hundred thirteen billion, one hundred eleven million, thirteen thousand, one hundred eleven".