7221472021 has 8 divisors (see below), whose sum is σ = 7311405024. Its totient is φ = 7131608880.

The previous prime is 7221472019. The next prime is 7221472031. The reversal of 7221472021 is 1202741227.

7221472021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7221472021 - 2¹ = 7221472019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7221472031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208611 + ... + 240751.

It is an arithmetic number, because the mean of its divisors is an integer number (913925628).

Almost surely, 2^7221472021 is an apocalyptic number.

It is an amenable number.

7221472021 is a deficient number, since it is larger than the sum of its proper divisors (89933003).

7221472021 is a wasteful number, since it uses less digits than its factorization.

7221472021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34931.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 7221472021 is about 84979.2446483257. The cubic root of 7221472021 is about 1932.8964020112.

The spelling of 7221472021 in words is "seven billion, two hundred twenty-one million, four hundred seventy-two thousand, twenty-one".