11211320213 has 4 divisors (see below), whose sum is σ = 11211539040. Its totient is φ = 11211101388.

The previous prime is 11211320203. The next prime is 11211320257. The reversal of 11211320213 is 31202311211.

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 11211320213 - 2⁸ = 11211319957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11211320191 and 11211320200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211320203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13358 + ... + 150336.

It is an arithmetic number, because the mean of its divisors is an integer number (2802884760).

Almost surely, 2^11211320213 is an apocalyptic number.

It is an amenable number.

11211320213 is a deficient number, since it is larger than the sum of its proper divisors (218827).

11211320213 is an equidigital number, since it uses as much as digits as its factorization.

11211320213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218826.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11211320213 its reverse (31202311211), we get a palindrome (42413631424).

The spelling of 11211320213 in words is "eleven billion, two hundred eleven million, three hundred twenty thousand, two hundred thirteen".