11213211331211 has 4 divisors (see below), whose sum is σ = 11249266673424. Its totient is φ = 11177155989000.

The previous prime is 11213211331207. The next prime is 11213211331229. The reversal of 11213211331211 is 11213311231211.

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 11213211331211 - 2² = 11213211331207 is a prime.

It is a super-2 number, since 2×11213211331211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11213211331111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18027670640 + ... + 18027671261.

It is an arithmetic number, because the mean of its divisors is an integer number (2812316668356).

Almost surely, 2^{11213211331211} is an apocalyptic number.

11213211331211 is a deficient number, since it is larger than the sum of its proper divisors (36055342213).

11213211331211 is an equidigital number, since it uses as much as digits as its factorization.

11213211331211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36055342212.

The product of its digits is 216, while the sum is 23.

Adding to 11213211331211 its reverse (11213311231211), we get a palindrome (22426522562422).

The spelling of 11213211331211 in words is "eleven trillion, two hundred thirteen billion, two hundred eleven million, three hundred thirty-one thousand, two hundred eleven".