7122421440 has 84 divisors (see below), whose sum is σ = 24498171984. Its totient is φ = 1899311616.

The previous prime is 7122421421. The next prime is 7122421447. The reversal of 7122421440 is 441242217.

It is not an unprimeable number, because it can be changed into a prime (7122421447) 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 11 ways as a sum of consecutive naturals, for example, 1233652 + ... + 1239411.

Almost surely, 2^7122421440 is an apocalyptic number.

It is an amenable number.

7122421440 is an abundant number, since it is smaller than the sum of its proper divisors (17375750544).

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

7122421440 is a wasteful number, since it uses less digits than its factorization.

7122421440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2473086 (or 2473073 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 7122421440 is about 84394.4396272645. The cubic root of 7122421440 is about 1924.0184068444.

Adding to 7122421440 its reverse (441242217), we get a palindrome (7563663657).

The spelling of 7122421440 in words is "seven billion, one hundred twenty-two million, four hundred twenty-one thousand, four hundred forty".