11220244421 has 4 divisors (see below), whose sum is σ = 11224645344. Its totient is φ = 11215843500.

The previous prime is 11220244417. The next prime is 11220244463. The reversal of 11220244421 is 12444202211.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12444202211 = 7 ⋅1777743173.

It is a cyclic number.

It is not a de Polignac number, because 11220244421 - 2² = 11220244417 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 (11220244621) 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 3 ways as a sum of consecutive naturals, for example, 2196635 + ... + 2201736.

It is an arithmetic number, because the mean of its divisors is an integer number (2806161336).

Almost surely, 2^11220244421 is an apocalyptic number.

It is an amenable number.

11220244421 is a deficient number, since it is larger than the sum of its proper divisors (4400923).

11220244421 is an equidigital number, since it uses as much as digits as its factorization.

11220244421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4400922.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 11220244421 its reverse (12444202211), we get a palindrome (23664446632).

The spelling of 11220244421 in words is "eleven billion, two hundred twenty million, two hundred forty-four thousand, four hundred twenty-one".