11133321213 has 12 divisors (see below), whose sum is σ = 17268008640. Its totient is φ = 6361897752.

The previous prime is 11133321209. The next prime is 11133321229. The reversal of 11133321213 is 31212333111.

It is a happy number.

It is not a de Polignac number, because 11133321213 - 2² = 11133321209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 11133321213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11133321713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37868293 + ... + 37868586.

It is an arithmetic number, because the mean of its divisors is an integer number (1439000720).

Almost surely, 2^11133321213 is an apocalyptic number.

It is an amenable number.

11133321213 is a deficient number, since it is larger than the sum of its proper divisors (6134687427).

11133321213 is an equidigital number, since it uses as much as digits as its factorization.

11133321213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75736896 (or 75736889 counting only the distinct ones).

The product of its digits is 324, while the sum is 21.

Adding to 11133321213 its reverse (31212333111), we get a palindrome (42345654324).

The spelling of 11133321213 in words is "eleven billion, one hundred thirty-three million, three hundred twenty-one thousand, two hundred thirteen".