11220021213 has 4 divisors (see below), whose sum is σ = 14960028288. Its totient is φ = 7480014140.

The previous prime is 11220021191. The next prime is 11220021217. The reversal of 11220021213 is 31212002211.

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 11220021213 - 2¹² = 11220017117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11220021192 and 11220021201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220021217) 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, 1870003533 + ... + 1870003538.

It is an arithmetic number, because the mean of its divisors is an integer number (3740007072).

Almost surely, 2^11220021213 is an apocalyptic number.

It is an amenable number.

11220021213 is a deficient number, since it is larger than the sum of its proper divisors (3740007075).

11220021213 is an equidigital number, since it uses as much as digits as its factorization.

11220021213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3740007074.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 11220021213 its reverse (31212002211), we get a palindrome (42432023424).

The spelling of 11220021213 in words is "eleven billion, two hundred twenty million, twenty-one thousand, two hundred thirteen".