6013220721 has 16 divisors (see below), whose sum is σ = 8179949568. Its totient is φ = 3928280400.

The previous prime is 6013220713. The next prime is 6013220747. The reversal of 6013220721 is 1270223106.

6013220721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6013220721 - 2³ = 6013220713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6013220691 and 6013220700.

It is not an unprimeable number, because it can be changed into a prime (6013220701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39925 + ... + 116706.

It is an arithmetic number, because the mean of its divisors is an integer number (511246848).

Almost surely, 2^6013220721 is an apocalyptic number.

It is an amenable number.

6013220721 is a deficient number, since it is larger than the sum of its proper divisors (2166728847).

6013220721 is a wasteful number, since it uses less digits than its factorization.

6013220721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156892.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 6013220721 is about 77544.9593526233. The cubic root of 6013220721 is about 1818.4542606630.

Adding to 6013220721 its reverse (1270223106), we get a palindrome (7283443827).

The spelling of 6013220721 in words is "six billion, thirteen million, two hundred twenty thousand, seven hundred twenty-one".