213013111 has 4 divisors (see below), whose sum is σ = 225543312. Its totient is φ = 200482912.

The previous prime is 213013103. The next prime is 213013117. The reversal of 213013111 is 111310312.

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 213013111 - 2³ = 213013103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213013091 and 213013100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213013117) 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, 6265075 + ... + 6265108.

It is an arithmetic number, because the mean of its divisors is an integer number (56385828).

Almost surely, 2^213013111 is an apocalyptic number.

213013111 is a deficient number, since it is larger than the sum of its proper divisors (12530201).

213013111 is a wasteful number, since it uses less digits than its factorization.

213013111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12530200.

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

The square root of 213013111 is about 14594.9686878732. The cubic root of 213013111 is about 597.2215152690.

Adding to 213013111 its reverse (111310312), we get a palindrome (324323423).

The spelling of 213013111 in words is "two hundred thirteen million, thirteen thousand, one hundred eleven".