7021421136 has 120 divisors (see below), whose sum is σ = 20329770240. Its totient is φ = 2259878400.

The previous prime is 7021421051. The next prime is 7021421137. The reversal of 7021421136 is 6311241207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7021421137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2324235 + ... + 2327253.

It is an arithmetic number, because the mean of its divisors is an integer number (169414752).

Almost surely, 2^7021421136 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 7021421136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10164885120).

7021421136 is an abundant number, since it is smaller than the sum of its proper divisors (13308349104).

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

7021421136 is a wasteful number, since it uses less digits than its factorization.

7021421136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3585 (or 3576 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 7021421136 is about 83793.9206386716. The cubic root of 7021421136 is about 1914.8804890116.

The spelling of 7021421136 in words is "seven billion, twenty-one million, four hundred twenty-one thousand, one hundred thirty-six".