213103111 has 4 divisors (see below), whose sum is σ = 229495672. Its totient is φ = 196710552.

The previous prime is 213103097. The next prime is 213103127. The reversal of 213103111 is 111301312.

213103111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 213103111 - 2¹⁵ = 213070343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 16392547 = 213103111 / (2 + 1 + 3 + 1 + 0 + 3 + 1 + 1 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213103091 and 213103100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213103151) 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, 8196261 + ... + 8196286.

It is an arithmetic number, because the mean of its divisors is an integer number (57373918).

Almost surely, 2^213103111 is an apocalyptic number.

213103111 is a deficient number, since it is larger than the sum of its proper divisors (16392561).

213103111 is a wasteful number, since it uses less digits than its factorization.

213103111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16392560.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 213103111 is about 14598.0516165686. The cubic root of 213103111 is about 597.3056139550.

Adding to 213103111 its reverse (111301312), we get a palindrome (324404423).

The spelling of 213103111 in words is "two hundred thirteen million, one hundred three thousand, one hundred eleven".