7012221720 has 128 divisors (see below), whose sum is σ = 24134077440. Its totient is φ = 1596648960.

The previous prime is 7012221701. The next prime is 7012221743. The reversal of 7012221720 is 271222107.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205050 + ... + 236790.

It is an arithmetic number, because the mean of its divisors is an integer number (188547480).

Almost surely, 2^7012221720 is an apocalyptic number.

7012221720 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7012221720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12067038720).

7012221720 is an abundant number, since it is smaller than the sum of its proper divisors (17121855720).

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

7012221720 is a wasteful number, since it uses less digits than its factorization.

7012221720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32025 (or 32021 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 7012221720 is about 83739.0095475221. The cubic root of 7012221720 is about 1914.0438359167.

Adding to 7012221720 its reverse (271222107), we get a palindrome (7283443827).

The spelling of 7012221720 in words is "seven billion, twelve million, two hundred twenty-one thousand, seven hundred twenty".