11221201213 has 4 divisors (see below), whose sum is σ = 11241715840. Its totient is φ = 11200686588.

The previous prime is 11221201193. The next prime is 11221201219. The reversal of 11221201213 is 31210212211.

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 11221201213 - 2²⁵ = 11187646781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221201219) 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, 10256493 + ... + 10257586.

It is an arithmetic number, because the mean of its divisors is an integer number (2810428960).

Almost surely, 2^11221201213 is an apocalyptic number.

It is an amenable number.

11221201213 is a deficient number, since it is larger than the sum of its proper divisors (20514627).

11221201213 is an equidigital number, since it uses as much as digits as its factorization.

11221201213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20514626.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 11221201213 its reverse (31210212211), we get a palindrome (42431413424).

The spelling of 11221201213 in words is "eleven billion, two hundred twenty-one million, two hundred one thousand, two hundred thirteen".