11221203213 has 56 divisors (see below), whose sum is σ = 18586945920. Its totient is φ = 6714264960.

The previous prime is 11221203197. The next prime is 11221203229. The reversal of 11221203213 is 31230212211.

It is an interprime number because it is at equal distance from previous prime (11221203197) and next prime (11221203229).

It is not a de Polignac number, because 11221203213 - 2⁴ = 11221203197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221203283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 624645 + ... + 642357.

Almost surely, 2^11221203213 is an apocalyptic number.

It is an amenable number.

11221203213 is a deficient number, since it is larger than the sum of its proper divisors (7365742707).

11221203213 is an equidigital number, since it uses as much as digits as its factorization.

11221203213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17821 (or 17806 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 11221203213 its reverse (31230212211), we get a palindrome (42451415424).

The spelling of 11221203213 in words is "eleven billion, two hundred twenty-one million, two hundred three thousand, two hundred thirteen".