12221001441 has 24 divisors (see below), whose sum is σ = 19970574624. Its totient is φ = 7406665920.

The previous prime is 12221001413. The next prime is 12221001461. The reversal of 12221001441 is 14410012221.

12221001441 is a `hidden beast` number, since 1 + 2 + 221 + 0 + 0 + 1 + 441 = 666.

It is not a de Polignac number, because 12221001441 - 2⁵ = 12221001409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12221001461) 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 23 ways as a sum of consecutive naturals, for example, 2283336 + ... + 2288681.

It is an arithmetic number, because the mean of its divisors is an integer number (832107276).

Almost surely, 2^12221001441 is an apocalyptic number.

12221001441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12221001441 is a deficient number, since it is larger than the sum of its proper divisors (7749573183).

12221001441 is an equidigital number, since it uses as much as digits as its factorization.

12221001441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4572043 (or 4572031 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12221001441 its reverse (14410012221), we get a palindrome (26631013662).

The spelling of 12221001441 in words is "twelve billion, two hundred twenty-one million, one thousand, four hundred forty-one".