4421221245 has 192 divisors, whose sum is σ = 9964512000. Its totient is φ = 1847204352.

The previous prime is 4421221243. The next prime is 4421221249. The reversal of 4421221245 is 5421221244.

It is a happy number.

4421221245 is a `hidden beast` number, since 442 + 1 + 2 + 212 + 4 + 5 = 666.

It is not a de Polignac number, because 4421221245 - 2¹ = 4421221243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4421221243) 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 191 ways as a sum of consecutive naturals, for example, 3644259 + ... + 3645471.

It is an arithmetic number, because the mean of its divisors is an integer number (51898500).

Almost surely, 2^4421221245 is an apocalyptic number.

4421221245 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4421221245 is an abundant number, since it is smaller than the sum of its proper divisors (5543290755).

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

4421221245 is a wasteful number, since it uses less digits than its factorization.

4421221245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289 (or 1276 counting only the distinct ones).

The product of its digits is 5120, while the sum is 27.

The square root of 4421221245 is about 66492.2645500964. The cubic root of 4421221245 is about 1641.2727138509.

Adding to 4421221245 its reverse (5421221244), we get a palindrome (9842442489).

Subtracting 4421221245 from its reverse (5421221244), we obtain a palindrome (999999999).

The spelling of 4421221245 in words is "four billion, four hundred twenty-one million, two hundred twenty-one thousand, two hundred forty-five".