12445222420 has 12 divisors (see below), whose sum is σ = 26134967124. Its totient is φ = 4978088960.

The previous prime is 12445222417. The next prime is 12445222423. The reversal of 12445222420 is 2422254421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12445222417) and next prime (12445222423).

It can be written as a sum of positive squares in 2 ways, for example, as 6177016836 + 6268205584 = 78594^2 + 79172^2 .

It is a super-2 number, since 2×12445222420² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12445222423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311130541 + ... + 311130580.

It is an arithmetic number, because the mean of its divisors is an integer number (2177913927).

Almost surely, 2^12445222420 is an apocalyptic number.

12445222420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12445222420 is an abundant number, since it is smaller than the sum of its proper divisors (13689744704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12445222420 is a wasteful number, since it uses less digits than its factorization.

12445222420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622261130 (or 622261128 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 28.

Adding to 12445222420 its reverse (2422254421), we get a palindrome (14867476841).

The spelling of 12445222420 in words is "twelve billion, four hundred forty-five million, two hundred twenty-two thousand, four hundred twenty".