4221212340 has 192 divisors, whose sum is σ = 12698542080. Its totient is φ = 1045716480.

The previous prime is 4221212339. The next prime is 4221212389. The reversal of 4221212340 is 432121224.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 5711691 + ... + 5712429.

It is an arithmetic number, because the mean of its divisors is an integer number (66138240).

Almost surely, 2^4221212340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4221212340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6349271040).

4221212340 is an abundant number, since it is smaller than the sum of its proper divisors (8477329740).

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

4221212340 is a wasteful number, since it uses less digits than its factorization.

4221212340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902 (or 900 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 4221212340 is about 64970.8576209365. The cubic root of 4221212340 is about 1616.1403238317.

Adding to 4221212340 its reverse (432121224), we get a palindrome (4653333564).

The spelling of 4221212340 in words is "four billion, two hundred twenty-one million, two hundred twelve thousand, three hundred forty".