11031221213 has 4 divisors (see below), whose sum is σ = 11032460928. Its totient is φ = 11029981500.

The previous prime is 11031221207. The next prime is 11031221249. The reversal of 11031221213 is 31212213011.

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 11031221213 - 2¹⁴ = 11031204829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11031221191 and 11031221200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11031221203) 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, 606413 + ... + 624338.

It is an arithmetic number, because the mean of its divisors is an integer number (2758115232).

Almost surely, 2^11031221213 is an apocalyptic number.

It is an amenable number.

11031221213 is a deficient number, since it is larger than the sum of its proper divisors (1239715).

11031221213 is an equidigital number, since it uses as much as digits as its factorization.

11031221213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239714.

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

Adding to 11031221213 its reverse (31212213011), we get a palindrome (42243434224).

The spelling of 11031221213 in words is "eleven billion, thirty-one million, two hundred twenty-one thousand, two hundred thirteen".