7120006021 has 16 divisors (see below), whose sum is σ = 7812446400. Its totient is φ = 6462892800.

The previous prime is 7120006007. The next prime is 7120006031. The reversal of 7120006021 is 1206000217.

It is a cyclic number.

It is not a de Polignac number, because 7120006021 - 2⁹ = 7120005509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7120006021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7120006031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22861 + ... + 121501.

It is an arithmetic number, because the mean of its divisors is an integer number (488277900).

Almost surely, 2^7120006021 is an apocalyptic number.

It is an amenable number.

7120006021 is a deficient number, since it is larger than the sum of its proper divisors (692440379).

7120006021 is a wasteful number, since it uses less digits than its factorization.

7120006021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98820.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 7120006021 is about 84380.1281167551. The cubic root of 7120006021 is about 1923.8008855000.

Adding to 7120006021 its reverse (1206000217), we get a palindrome (8326006238).

The spelling of 7120006021 in words is "seven billion, one hundred twenty million, six thousand, twenty-one".