11124210221 has 12 divisors (see below), whose sum is σ = 11571925500. Its totient is φ = 10692976320.

The previous prime is 11124210217. The next prime is 11124210277. The reversal of 11124210221 is 12201242111.

It can be written as a sum of positive squares in 2 ways, for example, as 4278468100 + 6845742121 = 65410^2 + 82739^2 .

It is not a de Polignac number, because 11124210221 - 2² = 11124210217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11124210221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11124210821) 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 11 ways as a sum of consecutive naturals, for example, 104345 + ... + 182033.

It is an arithmetic number, because the mean of its divisors is an integer number (964327125).

Almost surely, 2^11124210221 is an apocalyptic number.

It is an amenable number.

11124210221 is a deficient number, since it is larger than the sum of its proper divisors (447715279).

11124210221 is an equidigital number, since it uses as much as digits as its factorization.

11124210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77900 (or 77869 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 11124210221 its reverse (12201242111), we get a palindrome (23325452332).

The spelling of 11124210221 in words is "eleven billion, one hundred twenty-four million, two hundred ten thousand, two hundred twenty-one".