22244422421 has 16 divisors (see below), whose sum is σ = 24789164400. Its totient is φ = 19819204608.

The previous prime is 22244422411. The next prime is 22244422427. The reversal of 22244422421 is 12422444222.

It can be written as a sum of positive squares in 8 ways, for example, as 903303025 + 21341119396 = 30055^2 + 146086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22244422421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22244422427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1610075 + ... + 1623831.

It is an arithmetic number, because the mean of its divisors is an integer number (1549322775).

Almost surely, 2^22244422421 is an apocalyptic number.

It is an amenable number.

22244422421 is a deficient number, since it is larger than the sum of its proper divisors (2544741979).

22244422421 is a wasteful number, since it uses less digits than its factorization.

22244422421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18088.

The product of its digits is 16384, while the sum is 29.

Adding to 22244422421 its reverse (12422444222), we get a palindrome (34666866643).

The spelling of 22244422421 in words is "twenty-two billion, two hundred forty-four million, four hundred twenty-two thousand, four hundred twenty-one".