1222444421 has 16 divisors (see below), whose sum is σ = 1379524608. Its totient is φ = 1073175600.

The previous prime is 1222444409. The next prime is 1222444427. The reversal of 1222444421 is 1244442221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1222444421 - 2²⁶ = 1155335557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222444427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167960 + ... + 175086.

It is an arithmetic number, because the mean of its divisors is an integer number (86220288).

Almost surely, 2^1222444421 is an apocalyptic number.

1222444421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1222444421 is a deficient number, since it is larger than the sum of its proper divisors (157080187).

1222444421 is a wasteful number, since it uses less digits than its factorization.

1222444421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7672.

The product of its digits is 4096, while the sum is 26.

The square root of 1222444421 is about 34963.4726679144. The cubic root of 1222444421 is about 1069.2428979097.

Adding to 1222444421 its reverse (1244442221), we get a palindrome (2466886642).

The spelling of 1222444421 in words is "one billion, two hundred twenty-two million, four hundred forty-four thousand, four hundred twenty-one".