201311213 has 4 divisors (see below), whose sum is σ = 211906560. Its totient is φ = 190715868.

The previous prime is 201311183. The next prime is 201311219. The reversal of 201311213 is 312113102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201311213 - 2²⁰ = 200262637 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 (201311219) 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, 5297645 + ... + 5297682.

It is an arithmetic number, because the mean of its divisors is an integer number (52976640).

Almost surely, 2^201311213 is an apocalyptic number.

It is an amenable number.

201311213 is a deficient number, since it is larger than the sum of its proper divisors (10595347).

201311213 is a wasteful number, since it uses less digits than its factorization.

201311213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10595346.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 201311213 is about 14188.4182698425. The cubic root of 201311213 is about 586.0787682366.

Adding to 201311213 its reverse (312113102), we get a palindrome (513424315).

The spelling of 201311213 in words is "two hundred one million, three hundred eleven thousand, two hundred thirteen".